Common Weakness Enumeration
CWE-1284
AllowedImproper Validation of Specified Quantity in Input
Abstraction: Base · Status: Incomplete
The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.
316 vulnerabilities reference this CWE, most recent first.
CVE-2026-93345 (GCVE-0-2026-93345)
Vulnerability from cvelistv5 – Published: 2026-09-22 17:07 – Updated: 2026-10-01 15:21
VLAI
EPSS
VEX
Title
MikroTik RouterOS < 7.25beta4 Improper Input Validation DoS via BGP Labelled-VPN NLRI
Summary
MikroTik RouterOS before 7.25beta4 contains an improper input validation vulnerability in the labelled-VPN NLRI iterators of the routing service that allows an unauthenticated on-path attacker to crash the BGP service by sending a malformed MP_REACH_NLRI UPDATE message with a prefix-length value below the minimum valid for a labelled-VPN NLRI, which passes validation while describing a route with a negative-length address portion. Attackers can repeatedly send a single BGP UPDATE packet carrying a VPNv4 or VPNv6 NLRI with an out-of-bounds prefix-length to indefinitely hold down the BGP plane, causing session termination without a NOTIFICATION and triggering a service malfunction on the device. The fix is carried only in 7.25beta4, a development build; the current stable release 7.24.2 and the current long-term release 7.23.5 both remain affected.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 18:26 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
VulnCheck
CNA
References
2 references
| URL | Tags |
|---|---|
| https://forum.mikrotik.com/t/7-25beta-development… | release-notespatch |
| https://www.vulncheck.com/advisories/mikrotik-rou… | third-party-advisory |
Impacted products
Date Public
2026-09-10 00:00
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CVE-2026-93015 (GCVE-0-2026-93015)
Vulnerability from cvelistv5 – Published: 2026-09-17 15:16 – Updated: 2026-09-17 19:19
VLAI
EPSS
VEX
Title
BlueKitchen BTstack through 1.8.2 A2DP SEP Discovery Out-of-Bounds Write
Summary
BlueKitchen BTstack through 1.8.2 fails to validate the peer-reported endpoint count against table bounds in A2DP stream endpoint discovery. A bonded peer can send an AVDTP DISCOVER response with more endpoints than the fixed table holds, causing out-of-bounds writes that corrupt adjacent static objects and crash the process or sever event delivery.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 19:17 UTC
Assigner
VulnCheck
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/bluekitchen/btstack/commit/fc2… | patch |
| https://github.com/bluekitchen/btstack/blob/v1.8.… | technical-description |
| https://github.com/bluekitchen/btstack/blob/v1.8.… | technical-description |
| https://github.com/bluekitchen/btstack | product |
| https://www.vulncheck.com/advisories/bluekitchen-… | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| BlueKitchen GmbH | BTstack |
Affected:
0 , ≤ 1.8.2
(semver)
|
Date Public
2026-07-22 00:00
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CVE-2026-91137 (GCVE-0-2026-91137)
Vulnerability from cvelistv5 – Published: 2026-10-02 10:18 – Updated: 2026-10-02 10:44
VLAI
EPSS
VEX
Title
Apache Thrift: PHP `thrift_protocol` accelerator: zero-byte container elements
Summary
Improper validation of specified quantity in input, Allocation of resources without limits or throttling, Excessive Iteration vulnerability in Apache Thrift PHP bindings.
This issue affects Apache Thrift: before 0.25.0.
Users are recommended to upgrade to version 0.25.0, which fixes the issue.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-02 10:43 UTC
CWE
Assigner
apache
CNA
References
2 references
| URL | Tags |
|---|---|
| https://lists.apache.org/thread/33otcgbqd27wf6qq8… | vendor-advisory |
| https://lists.apache.org/thread/bf12g1b11r4x9x3ws… | vendor-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Apache Software Foundation | Apache Thrift |
Affected:
0 , < 0.25.0
(semver)
|
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CVE-2026-91041 (GCVE-0-2026-91041)
Vulnerability from cvelistv5 – Published: 2026-10-20 13:10 – Updated: 2026-10-20 15:30
VLAI
EPSS
VEX
Title
FileX fault-tolerant log replay writes past the destination sector when mounting a crafted FAT image
Summary
Mounting an attacker-controlled FAT image with fault tolerance enabled causes an out-of-bounds heap write during log replay. The write is attacker-positioned and attacker-valued, and on a common embedded memory layout it reaches the FX_MEDIA driver callback, giving control of the instruction pointer.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-20 15:29 UTC
Assigner
eclipse
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse ThreadX - FileX |
Affected:
0 , ≤ 6.5.1.202602
(custom)
Unaffected: 6.5.2.202603 |
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CVE-2026-89420 (GCVE-0-2026-89420)
Vulnerability from cvelistv5 – Published: 2026-09-22 11:16 – Updated: 2026-09-22 12:04
VLAI
EPSS
VEX
Title
Session voucher adding no new funds is accepted without a charge in mpp, serving paid resources for free
Summary
Improper Validation of Specified Quantity in Input in ZenHive mpp allows a client holding an open payment channel to obtain paid resources without being charged.
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This issue affects mpp: from 0.14.0 before 0.16.2.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-22 12:03 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
EEF
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/ZenHive/mpp/security/advisorie… | relatedvendor-advisory |
| https://cna.erlef.org/cves/CVE-2026-89420.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-89420 | related |
| https://github.com/ZenHive/mpp/commit/82df569c898… | related |
| https://github.com/ZenHive/mpp/commit/7270edc1dcf… | patch |
Impacted products
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CVE-2026-87962 (GCVE-0-2026-87962)
Vulnerability from cvelistv5 – Published: 2026-09-10 10:52 – Updated: 2026-09-10 12:56
VLAI
EPSS
VEX
Title
t-digest 3.1 through 3.3 Denial of Service via Unvalidated Length Fields in MergingDigest.fromBytes
Summary
t-digest versions 3.1 through 3.3 contain a denial of service vulnerability in MergingDigest.fromBytes that fails to validate length and capacity fields from serialized data. Attackers can supply crafted serialized digests with mismatched header fields to trigger ArrayIndexOutOfBoundsException or NegativeArraySizeException, aborting the parsing thread.
Severity
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-10 12:56 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/tdunning/t-digest/issues/227 | issue-tracking |
| https://github.com/tdunning/t-digest/blob/7905f3d… | technical-description |
| https://github.com/tdunning/t-digest | product |
| https://www.vulncheck.com/advisories/t-digest-3.1… | third-party-advisory |
Date Public
2026-08-14 00:00
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CVE-2026-87735 (GCVE-0-2026-87735)
Vulnerability from cvelistv5 – Published: 2026-09-09 04:16 – Updated: 2026-09-09 18:39
VLAI
EPSS
VEX
Summary
An issue was discovered in the mirage-crypto-pk package before 2.3.0 for OCaml. There is an undocumented exception for a small message during RSA decryption or encryption.
Severity
4.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-09 18:39 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
mitre
CNA
References
1 reference
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| OCaml | mirage-crypto-pk |
Affected:
0 , < 2.3.0
(semver)
|
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CVE-2026-86133 (GCVE-0-2026-86133)
Vulnerability from cvelistv5 – Published: 2026-09-29 23:05 – Updated: 2026-09-30 15:28
VLAI
EPSS
VEX
Title
Fireware OS Pre-Authentication Integer Underflow in iked Allows Remote Denial of Service
Summary
An integer underflow vulnerability in the WatchGuard Fireware OS IKE daemon (iked) allows a remote attacker who has completed the initial IKEv2 handshake to crash the iked process by sending a specially crafted encrypted IKEv2 message, resulting in a denial of service.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-30 14:24 UTC
Assigner
WatchGuard
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://psirt.watchguard.com/CVE-2026-86133 | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| WatchGuard | Fireware OS |
Affected:
2026.3 , < 2026.3.2
(custom)
Affected: 2025.0 , < 2026.2.3 (custom) Affected: 12.0 , < 12.12.3 (custom) |
|
| WatchGuard | Fireware OS |
Affected:
12.0 , < 12.5.21
(custom)
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CVE-2026-85201 (GCVE-0-2026-85201)
Vulnerability from cvelistv5 – Published: 2026-09-07 10:01 – Updated: 2026-09-08 15:06
VLAI
EPSS
VEX
Summary
In Eclipse Ankaios versions 0.1.0 through 1.0.1, the agent does not limit the length declared by a workload in a length-delimited protobuf message received through the Control Interface FIFO. A workload granted Control Interface access can specify an excessive message length, causing an unbounded memory allocation that may abort the Ankaios agent process. This results in loss of orchestration services for workloads managed by the affected agent.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 15:05 UTC
CWE
Assigner
eclipse
CNA
References
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Eclipse Foundation | Eclipse Ankaios |
Affected:
0.1.0 , ≤ 1.0.1
(semver)
|
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CVE-2026-82752 (GCVE-0-2026-82752)
Vulnerability from cvelistv5 – Published: 2026-09-05 17:16 – Updated: 2026-09-08 18:20
VLAI
EPSS
VEX
Title
Ash string length constraints count graphemes, so a combining-mark string of any size passes max_length
Summary
Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to store a value of arbitrary size in an attribute whose length constraint should bound it.
Ash measures string length with Elixir's String.length/1, which counts Unicode graphemes, in the max_length and min_length constraints of Ash.Type.String (apply_constraints/2 in lib/ash/type/string.ex), in Ash.Resource.Validation.StringLength, and in the string_length expression function. A grapheme carries an unbounded number of combining marks, so a base character followed by a million combining acute accents is one grapheme and megabytes of data, and satisfies max_length: 2. Where the data layer imposes no independent limit (ETS, Mnesia, or a Postgres text column) the whole value is persisted, so an attacker can write an entire request body into an attribute declared with a small maximum and grow storage without bound.
The counting unit also disagrees with the storage layer, which counts codepoints rather than graphemes, so a value accepted by the constraint can still be rejected or truncated by the column. A Postgres varchar(n) column bounds the value itself and is not exposed.
This issue affects ash: from 0.10.0 before 3.33.0.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-08 18:19 UTC
CWE
- CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
EEF
CNA
References
5 references
| URL | Tags |
|---|---|
| https://github.com/ash-project/ash/security/advis… | vendor-advisoryrelated |
| https://cna.erlef.org/cves/CVE-2026-82752.html | related |
| https://osv.dev/vulnerability/EEF-CVE-2026-82752 | related |
| https://github.com/ash-project/ash/commit/a64cab4… | patch |
| https://github.com/ash-project/ash/commit/cdbf4c4… | patch |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| ash-project | ash |
Affected:
0.10.0 , < 3.33.0
(semver)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
|
| ash-project | ash |
Affected:
05848d5f4affe60fddd812222a18ada080c0813b , < *
(git)
cpe:2.3:a:ash-project:ash:*:*:*:*:*:*:*:* |
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"value": "A resource attribute must carry a `max_length` constraint (or an equivalent `string_length` validation) fed from client input, and the data layer must impose no independent size limit of its own. The ETS and Mnesia data layers and Postgres `text` columns store the value in full; a Postgres `varchar(n)` column bounds it independently and is not exposed."
}
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"value": "A resource attribute must carry a max_length constraint (or an equivalent string_length validation) fed from client input, and the data layer must impose no independent size limit of its own. The ETS and Mnesia data layers and Postgres text columns store the value in full; a Postgres varchar(n) column bounds it independently and is not exposed."
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"cpeApplicability": [
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"nodes": [
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"cpeMatch": [
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"credits": [
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"type": "finder",
"value": "Jonatan M\u00e4nnchen / EEF"
},
{
"lang": "en",
"type": "reporter",
"value": "Jonatan M\u00e4nnchen / EEF"
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{
"lang": "en",
"type": "remediation developer",
"value": "Zach Daniel / Ash Project"
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{
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"value": "\u003cp\u003eImproper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to store a value of arbitrary size in an attribute whose length constraint should bound it.\u003c/p\u003e\n\u003cp\u003eAsh measures string length with Elixir\u0027s \u003ccode\u003eString.length/1\u003c/code\u003e, which counts Unicode graphemes, in the \u003ccode\u003emax_length\u003c/code\u003e and \u003ccode\u003emin_length\u003c/code\u003e constraints of \u003ccode\u003eAsh.Type.String\u003c/code\u003e (\u003ccode\u003eapply_constraints/2\u003c/code\u003e in \u003ccode\u003elib/ash/type/string.ex\u003c/code\u003e), in \u003ccode\u003eAsh.Resource.Validation.StringLength\u003c/code\u003e, and in the \u003ccode\u003estring_length\u003c/code\u003e expression function. A grapheme carries an unbounded number of combining marks, so a base character followed by a million combining acute accents is one grapheme and megabytes of data, and satisfies \u003ccode\u003emax_length: 2\u003c/code\u003e. Where the data layer imposes no independent limit (ETS, Mnesia, or a Postgres \u003ccode\u003etext\u003c/code\u003e column) the whole value is persisted, so an attacker can write an entire request body into an attribute declared with a small maximum and grow storage without bound.\u003c/p\u003e\n\u003cp\u003eThe counting unit also disagrees with the storage layer, which counts codepoints rather than graphemes, so a value accepted by the constraint can still be rejected or truncated by the column. A Postgres \u003ccode\u003evarchar(n)\u003c/code\u003e column bounds the value itself and is not exposed.\u003c/p\u003e\n\u003cp\u003eThis issue affects ash: from 0.10.0 before 3.33.0.\u003c/p\u003e"
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"value": "Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to store a value of arbitrary size in an attribute whose length constraint should bound it.\n\nAsh measures string length with Elixir\u0027s `String.length/1`, which counts Unicode graphemes, in the `max_length` and `min_length` constraints of `Ash.Type.String` (`apply_constraints/2` in `lib/ash/type/string.ex`), in `Ash.Resource.Validation.StringLength`, and in the `string_length` expression function. A grapheme carries an unbounded number of combining marks, so a base character followed by a million combining acute accents is one grapheme and megabytes of data, and satisfies `max_length: 2`. Where the data layer imposes no independent limit (ETS, Mnesia, or a Postgres `text` column) the whole value is persisted, so an attacker can write an entire request body into an attribute declared with a small maximum and grow storage without bound.\n\nThe counting unit also disagrees with the storage layer, which counts codepoints rather than graphemes, so a value accepted by the constraint can still be rejected or truncated by the column. A Postgres `varchar(n)` column bounds the value itself and is not exposed.\n\nThis issue affects ash: from 0.10.0 before 3.33.0."
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"value": "Improper Validation of Specified Quantity in Input vulnerability in ash-project ash allows an attacker to store a value of arbitrary size in an attribute whose length constraint should bound it.\n\nAsh measures string length with Elixir\u0027s String.length/1, which counts Unicode graphemes, in the max_length and min_length constraints of Ash.Type.String (apply_constraints/2 in lib/ash/type/string.ex), in Ash.Resource.Validation.StringLength, and in the string_length expression function. A grapheme carries an unbounded number of combining marks, so a base character followed by a million combining acute accents is one grapheme and megabytes of data, and satisfies max_length: 2. Where the data layer imposes no independent limit (ETS, Mnesia, or a Postgres text column) the whole value is persisted, so an attacker can write an entire request body into an attribute declared with a small maximum and grow storage without bound.\n\nThe counting unit also disagrees with the storage layer, which counts codepoints rather than graphemes, so a value accepted by the constraint can still be rejected or truncated by the column. A Postgres varchar(n) column bounds the value itself and is not exposed.\n\nThis issue affects ash: from 0.10.0 before 3.33.0."
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"metrics": [
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"privilegesRequired": "NONE",
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"userInteraction": "NONE",
"valueDensity": "NOT_DEFINED",
"vectorString": "CVSS:4.0/AV:L/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N",
"version": "4.0",
"vulnAvailabilityImpact": "HIGH",
"vulnConfidentialityImpact": "NONE",
"vulnIntegrityImpact": "LOW",
"vulnerabilityResponseEffort": "NOT_DEFINED"
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"problemTypes": [
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"descriptions": [
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"cweId": "CWE-1284",
"description": "CWE-1284 Improper Validation of Specified Quantity in Input",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-05T17:16:16.722Z",
"orgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"shortName": "EEF"
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"references": [
{
"tags": [
"vendor-advisory",
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"url": "https://github.com/ash-project/ash/security/advisories/GHSA-cwjv-574p-59f6"
},
{
"tags": [
"related"
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"url": "https://cna.erlef.org/cves/CVE-2026-82752.html"
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{
"tags": [
"related"
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"url": "https://osv.dev/vulnerability/EEF-CVE-2026-82752"
},
{
"tags": [
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"url": "https://github.com/ash-project/ash/commit/a64cab49b8886503e6b7c7b211d83c475aac48ca"
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"tags": [
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"url": "https://github.com/ash-project/ash/commit/cdbf4c4da6bda5f6f139078f01a64320b595216d"
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],
"source": {
"discovery": "EXTERNAL"
},
"title": "Ash string length constraints count graphemes, so a combining-mark string of any size passes max_length"
}
},
"cveMetadata": {
"assignerOrgId": "6b3ad84c-e1a6-4bf7-a703-f496b71e49db",
"assignerShortName": "EEF",
"cveId": "CVE-2026-82752",
"datePublished": "2026-09-05T17:16:16.722Z",
"dateReserved": "2026-08-31T01:00:10.817Z",
"dateUpdated": "2026-09-08T18:20:03.503Z",
"state": "PUBLISHED"
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Mitigation MIT-5
Implementation
Strategy: Input Validation
- Assume all input is malicious. Use an "accept known good" input validation strategy, i.e., use a list of acceptable inputs that strictly conform to specifications. Reject any input that does not strictly conform to specifications, or transform it into something that does.
- When performing input validation, consider all potentially relevant properties, including length, type of input, the full range of acceptable values, missing or extra inputs, syntax, consistency across related fields, and conformance to business rules. As an example of business rule logic, "boat" may be syntactically valid because it only contains alphanumeric characters, but it is not valid if the input is only expected to contain colors such as "red" or "blue."
- Do not rely exclusively on looking for malicious or malformed inputs. This is likely to miss at least one undesirable input, especially if the code's environment changes. This can give attackers enough room to bypass the intended validation. However, denylists can be useful for detecting potential attacks or determining which inputs are so malformed that they should be rejected outright.
No CAPEC attack patterns related to this CWE.