CVE-2026-113351
highlibexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap all…
Vendor / product: Libexpat Project — libexpat
libexpat 2.7.2 through 2.9.0 contains a denial of service vulnerability because XML_ParserReset zeroes the direct byte count but never offsets tracked heap allocations. Attackers can submit a large XML document so later documents on the same reset parser fail with XML_ERROR_NO_MEMORY until it is recreated.
CVSS
7.5
7.5 (CVSS v3.1)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Severity source: NVD CVSS v3.1 (nvd@nist.gov)
Timeline (UTC)
Published: 2026-10-20 11:17
Modified: 2026-11-03 21:26
NVD status: Analyzed
Last synced 1 day ago
Verified against the source API 2026-11-03 21:53 UTC
Exploitation
Not listed in CISA KEV (as of last catalog sync)
Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).
Affected products
libexpat_project / libexpat ≥2.7.2 ≤2.9.0
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
Patch / mitigation: https://github.com/libexpat/libexpat/pull/1431
References
- https://github.com/libexpat/libexpat disclosure@vulncheck.com
- https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106a2/expat/l... disclosure@vulncheck.com
- https://github.com/libexpat/libexpat/blob/a76b1174c1ea52abb639a4c69d52b630a8a106a2/expat/l... disclosure@vulncheck.com
- https://github.com/libexpat/libexpat/pull/1431 disclosure@vulncheck.com
- https://www.vulncheck.com/advisories/libexpat-2.7.2-through-2.9.0-denial-of-service-via-xm... disclosure@vulncheck.com
Data sources
NVD CVE API 2.0 — fetched 2026-11-03 21:53 UTC · record ↗