MEDIUMCVSS v3.1 5.9Vulnerability
CVE-2026-118370
libexpat through 2.9.0 contains a signed integer overflow vulnerability in storeAtts() in lib/xmlparse.c that allows attackers to trigger out-of-bounds writes via oversized attribute counts. Attackers can supply a multi-gigabyte document with a start tag carrying over 2^30 attributes to overflow attIndex and nPrefixes, crashing applications or corrupting heap memory.
Properties
- Severity
- MEDIUM
- Nvd fetched at
- 2026-10-28T03:35:08.633330+00:00
- Cvss score
- 5.9
- Cvss severity
- MEDIUM
- Retrieved at
- 2026-10-28T03:36:16+00:00
- Score
- 5.9
- Last source
- NVD
- Cvss version
- 3.1
- Cve id
- CVE-2026-118370
- Cvss vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- First seen by Signal
- 2026-10-28T03:36:16+00:00
- Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
- Published at
- 2026-10-28T03:17:13.293
- Last modified
- 2026-10-28T03:17:13.293
Related Entities (1)
HAS_WEAKNESS (1)
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