Common Weakness Enumeration

CWE-1284

Allowed

Improper 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-2026-53720 (GCVE-0-2026-53720)

Vulnerability from cvelistv5 – Published: 2026-09-03 15:30 – Updated: 2026-09-03 15:42
VLAI
Title
pymonocypher: Potential heap buffer overflow on nb_blocks in argon2i_32 when provided buffer is too small
Summary
pymonocypher uses cython to wrap the Monocypher C library. Prior to version 4.0.2.8, the argon2i_32 implementation does not check the nb_blocks size. If the caller does not provide a sufficiently large buffer based on the API contract, then argon2i_32 will write past the end of the buffer and possibly corrupt the heap. This issue has been patched in version 4.0.2.8.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-03 15:42 UTC
CWE
  • CWE-122 - Heap-based Buffer Overflow
  • CWE-787 - Out-of-bounds Write
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
GitHub_M CNA
Impacted products
Vendor Product Version
jetperch pymonocypher Affected: < 4.0.2.8
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CVE-2026-53689 (GCVE-0-2026-53689)

Vulnerability from cvelistv5 – Published: 2026-06-10 13:44 – Updated: 2026-07-19 08:47
VLAI
Summary
libnfs through 6.0.2 before 55c18ea does not validate a string size, leading to an integer overflow during a connection to a crafted NFS server. This occurs in libnfs_zdr_string in lib/libnfs-zdr.c.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-10 16:01 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
mitre CNA
Impacted products
Vendor Product Version
sahlberg libnfs Affected: 0 , < 55c18ea33a83d667f79f0ef209c96895795c729f (git)
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CVE-2026-53587 (GCVE-0-2026-53587)

Vulnerability from cvelistv5 – Published: 2026-08-20 18:36 – Updated: 2026-08-20 19:18
VLAI
Title
libgit2 - Unauthenticated network-reachable heap out-of-bounds read in transports/smart_pkt.c:set_data
Summary
libgit2 is a portable C implementation of the Git core methods provided as a linkable library with a solid API, allowing to build Git functionality into your application. Prior to 1.8.6 and 1.9.5, libgit2 performs a fixed-size strncmp in set_data in src/libgit2/transports/smart_pkt.c without first verifying that the smart-protocol pkt-line capability buffer contains 14 bytes. A malicious Git server can make bytes after the pkt-line complete object-format=, causing format_str to advance beyond the pkt-line and the following memchr length calculation to underflow. The resulting heap out-of-bounds walk can crash a client during the first refs-advertisement packet over HTTP, HTTPS, SSH, or the Git protocol. This issue is fixed in versions 1.8.6 and 1.9.5.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-20 19:18 UTC
CWE
  • CWE-20 - Improper Input Validation
  • CWE-125 - Out-of-bounds Read
  • CWE-126 - Buffer Over-read
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
GitHub_M CNA
Impacted products
Vendor Product Version
libgit2 libgit2 Affected: < 1.8.6
Affected: >= 1.9.0, < 1.9.5
Create a notification for this product.
Show details on NVD website

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CVE-2026-53540 (GCVE-0-2026-53540)

Vulnerability from cvelistv5 – Published: 2026-06-22 16:58 – Updated: 2026-06-22 17:21
VLAI
Title
Python-Multipart: Negative Content-Length in parse_form buffers the entire body in memory
Summary
Python-Multipart is a streaming multipart parser for Python. Prior to 0.0.31, parse_form() did not validate the Content-Length header before using it to bound its chunked read of the request body. A negative Content-Length turned the bounded read into a read-until-EOF, so the entire body was loaded into memory in a single read instead of in fixed-size chunks. This vulnerability is fixed in 0.0.31.
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-22 17:21 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
GitHub_M CNA
References
Impacted products
Vendor Product Version
Kludex python-multipart Affected: < 0.0.31
Create a notification for this product.
Show details on NVD website

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CVE-2026-50285 (GCVE-0-2026-50285)

Vulnerability from cvelistv5 – Published: 2026-09-17 19:49 – Updated: 2026-09-17 20:19
VLAI
Title
Pomerium: Pre-Auth Memory Exhaustion via Unbounded zstd Decompression in HPKE Callback
Summary
Pomerium is an identity and context-aware access proxy. Prior to 0.32.8, decodeQueryStringV2 in pkg/hpke/url.go performs zstd decompression of attacker-controlled data without an output-memory limit when DecryptURLValues processes HPKE V2 values for Stateless.Callback in internal/authenticateflow/stateless.go. In hosted or stateless authentication deployments, an unauthenticated attacker can obtain the receiver key from /.well-known/pomerium/hpke-public-key, provide a matching attacker-controlled sender key, and send a compressed payload to /.pomerium/callback that expands before validateSenderPublicKey rejects the sender. This can allocate hundreds of megabytes per request, exhaust proxy memory, crash or degrade the process, and block access to applications protected by the deployment. Stateful deployments are not affected because the stateful callback verifies its HMAC signature before decryption and decompression. This issue is fixed in version 0.32.8.
SSVC
Exploitation: poc Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-17 20:19 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
  • CWE-770 - Allocation of Resources Without Limits or Throttling
Assigner
GitHub_M CNA
Impacted products
Vendor Product Version
pomerium pomerium Affected: < 0.32.8
Create a notification for this product.
Show details on NVD website

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CVE-2026-49777 (GCVE-0-2026-49777)

Vulnerability from cvelistv5 – Published: 2026-06-05 08:59 – Updated: 2026-06-08 16:18
VLAI
Title
WordPress Product Slider Pro for WooCommerce plugin < 3.5.4 - Backdoor vulnerability
Summary
Improper Validation of Specified Quantity in Input vulnerability in ShapedPlugin, LLC Product Slider Pro for WooCommerce allows Malicious Software Implanted. This issue affects Product Slider Pro for WooCommerce: from n/a before 3.5.4.
SSVC
Exploitation: none Automatable: yes Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-06 17:23 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
Show details on NVD website

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CVE-2026-49110 (GCVE-0-2026-49110)

Vulnerability from cvelistv5 – Published: 2026-06-15 20:19 – Updated: 2026-06-16 14:36
VLAI
Title
WordPress Upsell Order Bump Offer for WooCommerce plugin <= 3.1.4 - Price Manipulation vulnerability
Summary
Unauthenticated Broken Authentication in Upsell Order Bump Offer for WooCommerce <= 3.1.4 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 14:36 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
Vendor Product Version
WP Swings Upsell Order Bump Offer for WooCommerce Affected: n/a , ≤ 3.1.4 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-49078 (GCVE-0-2026-49078)

Vulnerability from cvelistv5 – Published: 2026-06-15 20:19 – Updated: 2026-06-16 01:19
VLAI
Title
WordPress WP Travel Engine plugin <= 6.7.10 - Other Vulnerability Type vulnerability
Summary
Unauthenticated Other Vulnerability Type in WP Travel Engine <= 6.7.10 versions.
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-16 01:05 UTC
CWE
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
References
Impacted products
Vendor Product Version
WP Travel Engine WP Travel Engine Affected: n/a , ≤ 6.7.10 (custom)
Create a notification for this product.
Show details on NVD website

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CVE-2026-48977 (GCVE-0-2026-48977)

Vulnerability from cvelistv5 – Published: 2026-09-17 20:26 – Updated: 2026-09-18 20:07
VLAI
Title
OpenSlide: Arbitrary memory write with crafted Ventana BIF file
Summary
OpenSlide is a C library for reading whole slide image files. From 3.4.1 until 4.0.1, OpenSlide's parse_level0_xml() processing in src/openslide-vendor-ventana.c accepts nonpositive row or column tile counts from a crafted Ventana BIF file. The invalid counts produce attacker-controlled relative memory offsets and allow arbitrary values to be written at those offsets, affecting all supported platforms and configurations and resulting in a crash or potential arbitrary code execution. This issue is fixed in version 4.0.1.
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-18 20:07 UTC
CWE
  • CWE-123 - Write-what-where Condition
  • CWE-823 - Use of Out-of-range Pointer Offset
  • CWE-1284 - Improper Validation of Specified Quantity in Input
Assigner
GitHub_M CNA
Impacted products
Vendor Product Version
openslide openslide Affected: >= 3.4.1, < 4.0.1
Create a notification for this product.
Show details on NVD website

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CVE-2026-48176 (GCVE-0-2026-48176)

Vulnerability from cvelistv5 – Published: 2026-11-05 02:36 – Updated: 2026-11-05 02:36
VLAI
Summary
A memory corruption vulnerability caused by improper validation of messages
Severity
No CVSS data available.
CWE
Assigner
Show details on NVD website

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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.