CWE-758
Allowed-with-ReviewReliance on Undefined, Unspecified, or Implementation-Defined Behavior
Abstraction: Class · Status: Incomplete
The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity.
33 vulnerabilities reference this CWE, most recent first.
GHSA-MRXG-J2XH-WG8Q
Vulnerability from github – Published: 2026-03-24 15:30 – Updated: 2026-03-24 21:31Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox < 149 and Firefox ESR < 140.9.
{
"affected": [],
"aliases": [
"CVE-2026-4705"
],
"database_specific": {
"cwe_ids": [
"CWE-758"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2026-03-24T13:16:06Z",
"severity": "CRITICAL"
},
"details": "Undefined behavior in the WebRTC: Signaling component. This vulnerability affects Firefox \u003c 149 and Firefox ESR \u003c 140.9.",
"id": "GHSA-mrxg-j2xh-wg8q",
"modified": "2026-03-24T21:31:22Z",
"published": "2026-03-24T15:30:28Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2026-4705"
},
{
"type": "WEB",
"url": "https://bugzilla.mozilla.org/show_bug.cgi?id=2014873"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-20"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-22"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-23"
},
{
"type": "WEB",
"url": "https://www.mozilla.org/security/advisories/mfsa2026-24"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H",
"type": "CVSS_V3"
}
]
}
GHSA-QG24-8XJ4-GJ2H
Vulnerability from github – Published: 2021-08-25 20:58 – Updated: 2021-08-18 20:17An issue was discovered in the chunky crate through 2020-08-25 for Rust. The Chunk API does not honor an alignment requirement.
{
"affected": [
{
"package": {
"ecosystem": "crates.io",
"name": "chunky"
},
"ranges": [
{
"events": [
{
"introduced": "0"
},
{
"last_affected": "0.3.7"
}
],
"type": "ECOSYSTEM"
}
]
}
],
"aliases": [
"CVE-2020-36433"
],
"database_specific": {
"cwe_ids": [
"CWE-758"
],
"github_reviewed": true,
"github_reviewed_at": "2021-08-18T20:17:28Z",
"nvd_published_at": "2021-08-08T06:15:00Z",
"severity": "HIGH"
},
"details": "An issue was discovered in the chunky crate through 2020-08-25 for Rust. The Chunk API does not honor an alignment requirement.",
"id": "GHSA-qg24-8xj4-gj2h",
"modified": "2021-08-18T20:17:28Z",
"published": "2021-08-25T20:58:13Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2020-36433"
},
{
"type": "WEB",
"url": "https://github.com/aeplay/chunky/issues/2"
},
{
"type": "PACKAGE",
"url": "https://github.com/aeplay/chunky"
},
{
"type": "WEB",
"url": "https://rustsec.org/advisories/RUSTSEC-2020-0035.html"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N",
"type": "CVSS_V3"
}
],
"summary": "Unaligned memory allocation in chunky"
}
GHSA-V57J-J5HJ-CGF3
Vulnerability from github – Published: 2025-10-02 00:32 – Updated: 2025-10-02 00:32OpenPLC_V3 has a vulnerability in the enipThread function that occurs due to the lack of a return value. This leads to a crash when the server loop ends and execution hits an illegal ud2 instruction. This issue can be triggered remotely without authentication by starting the same server multiple times or if the server exits unexpectedly. The vulnerability allows an attacker to cause a Denial of Service (DoS) against the PLC runtime, stopping any PC started remotely without authentication. This results in the PLC process crashing and halting all automation or control logic managed by OpenPLC.
{
"affected": [],
"aliases": [
"CVE-2025-54811"
],
"database_specific": {
"cwe_ids": [
"CWE-758"
],
"github_reviewed": false,
"github_reviewed_at": null,
"nvd_published_at": "2025-10-01T22:15:31Z",
"severity": "MODERATE"
},
"details": "OpenPLC_V3 has a vulnerability in the enipThread function that occurs due to the lack of a return value. This leads to a crash when the server loop ends and execution hits an illegal ud2 instruction. This issue can be triggered remotely without authentication by starting the same server multiple times or if the server exits unexpectedly. The vulnerability allows an attacker to cause a Denial of Service (DoS) against the PLC runtime, stopping any PC started remotely without authentication. This results in the PLC process crashing and halting all automation or control logic managed by OpenPLC.",
"id": "GHSA-v57j-j5hj-cgf3",
"modified": "2025-10-02T00:32:09Z",
"published": "2025-10-02T00:32:09Z",
"references": [
{
"type": "ADVISORY",
"url": "https://nvd.nist.gov/vuln/detail/CVE-2025-54811"
},
{
"type": "WEB",
"url": "https://github.com/thiagoralves/OpenPLC_v3"
},
{
"type": "WEB",
"url": "https://www.cisa.gov/news-events/ics-advisories/icsa-25-273-05"
}
],
"schema_version": "1.4.0",
"severity": [
{
"score": "CVSS:3.1/AV:L/AC:L/PR:N/UI:N/S:C/C:N/I:N/A:H",
"type": "CVSS_V3"
},
{
"score": "CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
"type": "CVSS_V4"
}
]
}
No mitigation information available for this CWE.
No CAPEC attack patterns related to this CWE.