Common Weakness Enumeration
CWE-789
AllowedMemory Allocation with Excessive Size Value
Abstraction: Variant · Status: Draft
The product allocates memory based on an untrusted, large size value, but it does not ensure that the size is within expected limits, allowing arbitrary amounts of memory to be allocated.
331 vulnerabilities reference this CWE, most recent first.
CVE-2026-39882 (GCVE-0-2026-39882)
Vulnerability from cvelistv5 – Published: 2026-04-08 20:24 – Updated: 2026-04-09 20:22
VLAI
EPSS
VEX
Title
OpenTelemetry-Go OTLP HTTP exporters read unbounded HTTP response bodies
Summary
OpenTelemetry-Go is the Go implementation of OpenTelemetry. Prior to 1.43.0, the otlp HTTP exporters (traces/metrics/logs) read the full HTTP response body into an in-memory bytes.Buffer without a size cap. This is exploitable for memory exhaustion when the configured collector endpoint is attacker-controlled (or a network attacker can mitm the exporter connection). This vulnerability is fixed in 1.43.0.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-09 20:21 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
2 references
| URL | Tags |
|---|---|
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_CONFIRM |
| https://github.com/open-telemetry/opentelemetry-g… | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open-telemetry | opentelemetry-go |
Affected:
< 1.43.0
|
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CVE-2026-39312 (GCVE-0-2026-39312)
Vulnerability from cvelistv5 – Published: 2026-04-07 16:52 – Updated: 2026-04-07 17:27
VLAI
EPSS
VEX
Title
Pre-Auth EAP-TLS DoS on SoftEther VPN Developer Edition
Summary
SoftEtherVPN is a an open-source cross-platform multi-protocol VPN Program. In 5.2.5188 and earlier, a pre-authentication denial-of-service vulnerability exists in SoftEther VPN Developer Edition 5.2.5188 (and likely earlier versions of Developer Edition). An unauthenticated remote attacker can crash the vpnserver process by sending a single malformed EAP-TLS packet over raw L2TP (UDP/1701), terminating all active VPN sessions.
Severity
7.5 (High)
SSVC
Exploitation: poc
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-07 17:27 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/SoftEtherVPN/SoftEtherVPN/secu… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| SoftEtherVPN | SoftEtherVPN |
Affected:
<= 5.2.5188
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CVE-2026-35633 (GCVE-0-2026-35633)
Vulnerability from cvelistv5 – Published: 2026-04-09 21:27 – Updated: 2026-06-23 16:15 X_Open Source
VLAI
EPSS
VEX
Title
OpenClaw < 2026.3.22 - Unbounded Memory Allocation via Remote Media Error Responses
Summary
OpenClaw before 2026.3.22 contains an unbounded memory allocation vulnerability in remote media HTTP error handling that allows attackers to trigger excessive memory consumption. Attackers can send crafted HTTP error responses with large bodies to remote media endpoints, causing the application to allocate unbounded memory before failure handling occurs.
Severity
5.3 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-14 03:09 UTC
CWE
- CWE-789 - Uncontrolled Memory Allocation
Assigner
VulnCheck
CNA
References
4 references
| URL | Tags |
|---|---|
| https://github.com/openclaw/openclaw/security/adv… | vendor-advisory |
| https://github.com/openclaw/openclaw/commit/630f1… | patch |
| https://github.com/openclaw/openclaw/commit/81445… | patch |
| https://www.vulncheck.com/advisories/openclaw-unb… | third-party-advisory |
Impacted products
Date Public
2026-03-24 00:00
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CVE-2026-35549 (GCVE-0-2026-35549)
Vulnerability from cvelistv5 – Published: 2026-04-03 05:00 – Updated: 2026-04-03 14:34
VLAI
EPSS
VEX
Summary
An issue was discovered in MariaDB Server before 11.4.10, 11.5.x through 11.8.x before 11.8.6, and 12.x before 12.2.2. If the caching_sha2_password authentication plugin is installed, and some user accounts are configured to use it, a large packet can crash the server because sha256_crypt_r uses alloca.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-03 14:33 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
mitre
CNA
References
1 reference
Impacted products
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CVE-2026-35186 (GCVE-0-2026-35186)
Vulnerability from cvelistv5 – Published: 2026-04-09 18:54 – Updated: 2026-04-13 20:18
VLAI
EPSS
VEX
Title
Wasmtime has an improperly masked return value from `table.grow` with Winch compiler backend
Summary
Wasmtime is a runtime for WebAssembly. From 25.0.0 to before 36.0.7, 42.0.2, and 43.0.1, Wasmtime's Winch compiler backend contains a bug where translating the table.grow operator causes the result to be incorrectly typed. For 32-bit tables this means that the result of the operator, internally in Winch, is tagged as a 64-bit value instead of a 32-bit value. This invalid internal representation of Winch's compiler state compounds into further issues depending on how the value is consumed. The primary consequence of this bug is that bytes in the host's address space can be stored/read from. This is only applicable to the 16 bytes before linear memory, however, as the only significant return value of table.grow that can be misinterpreted is -1. The bytes before linear memory are, by default, unmapped memory. Wasmtime will detect this fault and abort the process, however, because wasm should not be able to access these bytes. Overall this this bug in Winch represents a DoS vector by crashing the host process, a correctness issue within Winch, and a possible leak of up to 16-bytes before linear memory. Wasmtime's default compiler is Cranelift, not Winch, and Wasmtime's default settings are to place guard pages before linear memory. This means that Wasmtime's default configuration is not affected by this issue, and when explicitly choosing Winch Wasmtime's otherwise default configuration leads to a DoS. Disabling guard pages before linear memory is required to possibly leak up to 16-bytes of host data. This vulnerability is fixed in 36.0.7, 42.0.2, and 43.0.1.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-13 20:17 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/bytecodealliance/wasmtime/secu… | x_refsource_CONFIRM |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| bytecodealliance | wasmtime |
Affected:
>= 25.0.0, < 36.0.7
Affected: >= 37.0.0, < 42.0.2 Affected: >= 43.0.0, < 44.0.1 |
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CVE-2026-33592 (GCVE-0-2026-33592)
Vulnerability from cvelistv5 – Published: 2026-07-02 07:12 – Updated: 2026-07-02 12:30
VLAI
EPSS
VEX
Title
FindServers Memory Exhaustion in open62541
Summary
An unauthenticated remote attacker can exhaust
server memory via the FindServers Discovery Service in open62541. The
serverUris field of FindServersRequest is not validated for length or array
size. An attacker can declare an arbitrarily large string (up to ~3.9 GB)
delivered across intermediate chunks without ever sending the final chunk. The
server buffers all chunks in RAM indefinitely until the SecureChannel times
out. The attack is pre-session and bypasses all encryption configuration. The issue affects open62541: from 1.4.0 through 1.4.16, from 1.5.0 through 1.5.4, master.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-07-02 12:29 UTC
CWE
Assigner
ENISA
CNA
References
3 references
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| open62541 project / o6 Automation GmbH | open62541 |
Affected:
1.4.0 , ≤ 1.4.16
(semver)
Affected: 1.5.0 , ≤ 1.5.4 (semver) Affected: master (custom) |
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CVE-2026-33524 (GCVE-0-2026-33524)
Vulnerability from cvelistv5 – Published: 2026-04-24 18:18 – Updated: 2026-04-27 13:35
VLAI
EPSS
VEX
Title
Zserio: Integer Overflow in BitStreamReader and Unbounded Memory Allocation in Deserialization
Summary
Zserio is a framework for serializing structured data with a compact and efficient way with low overhead. Prior to 2.18.1, a crafted payload as small as 4-5 bytes can force memory allocations of up to 16 GB, crashing any process with an OOM error (Denial of Service). This vulnerability is fixed in 2.18.1.
Severity
7.5 (High)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-04-27 13:20 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/ndsev/zserio/security/advisori… | x_refsource_CONFIRM |
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CVE-2026-33374 (GCVE-0-2026-33374)
Vulnerability from cvelistv5 – Published: 2026-10-13 17:05 – Updated: 2026-10-13 19:21
VLAI
EPSS
VEX
Title
Unbounded memory allocation in the Prometheus rule conversion API
Summary
The Prometheus rule conversion API endpoints in Grafana do not limit request body size, allowing authenticated users to trigger unbounded memory allocations that can crash the server through out-of-memory conditions.
Severity
6.5 (Medium)
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-13 17:25 UTC
Assigner
GRAFANA
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://grafana.com/security/security-advisories/… | vendor-advisory |
Impacted products
2 products
| Vendor | Product | Version | |
|---|---|---|---|
| Grafana | Grafana Enterprise |
Affected:
12.0.0 , ≤ 12.3.11
(semver)
Affected: 12.4.0 , < 12.4.13 (semver) Affected: 13.0.0 , < 13.0.11 (semver) Affected: 13.1.0 , < 13.1.8 (semver) Affected: 13.2.0 , < 13.2.4 (semver) |
|
| Grafana | Grafana OSS |
Affected:
12.0.0 , ≤ 12.3.11
(semver)
Affected: 12.4.0 , < 12.4.13 (semver) Affected: 13.0.0 , < 13.0.11 (semver) Affected: 13.1.0 , < 13.1.8 (semver) Affected: 13.2.0 , < 13.2.4 (semver) |
Date Public
2026-10-13 11:41
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CVE-2026-33174 (GCVE-0-2026-33174)
Vulnerability from cvelistv5 – Published: 2026-03-23 23:24 – Updated: 2026-03-24 13:40
VLAI
EPSS
VEX
Title
Rails Active Storage has a possible DoS vulnerability when in proxy mode via Range requests
Summary
Active Storage allows users to attach cloud and local files in Rails applications. Prior to versions 8.1.2.1, 8.0.4.1, and 7.2.3.1, when serving files through Active Storage's proxy delivery mode, the proxy controller loads the entire requested byte range into memory before sending it. A request with a large or unbounded Range header (e.g. `bytes=0-`) could cause the server to allocate memory proportional to the file size, possibly resulting in a DoS vulnerability through memory exhaustion. Versions 8.1.2.1, 8.0.4.1, and 7.2.3.1 contain a patch.
Severity
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-24 13:40 UTC
CWE
- CWE-789 - Memory Allocation with Excessive Size Value
Assigner
GitHub_M
CNA
References
7 references
| URL | Tags |
|---|---|
| https://github.com/rails/rails/security/advisorie… | x_refsource_CONFIRM |
| https://github.com/rails/rails/commit/2cd933c366b… | x_refsource_MISC |
| https://github.com/rails/rails/commit/42012eaaa88… | x_refsource_MISC |
| https://github.com/rails/rails/commit/8159a9c3de3… | x_refsource_MISC |
| https://github.com/rails/rails/releases/tag/v7.2.3.1 | x_refsource_MISC |
| https://github.com/rails/rails/releases/tag/v8.0.4.1 | x_refsource_MISC |
| https://github.com/rails/rails/releases/tag/v8.1.2.1 | x_refsource_MISC |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| rails | activestorage |
Affected:
>= 8.1.0.beta1, < 8.1.2.1
Affected: >= 8.0.0.beta1, < 8.0.4.1 Affected: < 7.2.3.1 |
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CVE-2026-32941 (GCVE-0-2026-32941)
Vulnerability from cvelistv5 – Published: 2026-03-20 03:37 – Updated: 2026-03-21 02:53
VLAI
EPSS
VEX
Title
Sliver Vulnerable to Authenticated OOM via Memory Exhaustion in mTLS/WireGuard Transports
Summary
Sliver is a command and control framework that uses a custom Wireguard netstack. Versions 1.7.3 and below contain a Remote OOM (Out-of-Memory) vulnerability in the Sliver C2 server's mTLS and WireGuard C2 transport layer. The socketReadEnvelope and socketWGReadEnvelope functions trust an attacker-controlled 4-byte length prefix to allocate memory, with ServerMaxMessageSize allowing single allocations of up to ~2 GiB. A compromised implant or an attacker with valid credentials can exploit this by sending fabricated length prefixes over concurrent yamux streams (up to 128 per connection), forcing the server to attempt allocating ~256 GiB of memory and triggering an OS OOM kill. This crashes the Sliver server, disrupts all active implant sessions, and may degrade or kill other processes sharing the same host. The same pattern also affects all implant-side readers, which have no upper-bound check at all. The issue was not fixed at the the time of publication.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-03-21 02:53 UTC
CWE
Assigner
GitHub_M
CNA
References
1 reference
| URL | Tags |
|---|---|
| https://github.com/BishopFox/sliver/security/advi… | x_refsource_CONFIRM |
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Mitigation
Implementation
Architecture and Design
Perform adequate input validation against any value that influences the amount of memory that is allocated. Define an appropriate strategy for handling requests that exceed the limit, and consider supporting a configuration option so that the administrator can extend the amount of memory to be used if necessary.
Mitigation
Operation
Run your program using system-provided resource limits for memory. This might still cause the program to crash or exit, but the impact to the rest of the system will be minimized.
No CAPEC attack patterns related to this CWE.