CVE-2026-76956

HighCVSS 7.5/10Last modified Sep 8, 2026

Description

In libexpat 2.8.2 and 2.8.3 before 2.8.4, misinterpretation of getentropy's return code leads to insufficient entropy, which results in being vulnerable to hash flooding attacks, causing a denial of service via crafted XML content.

Metrics

CVSS 3.1 7.5/10CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Weakness enumeration

CWE-394

Affected software

Vendor	Product	Versions
libexpat project	libexpat	>= 2.8.2, < 2.8.4

References

https://github.com/libexpat/libexpat/pull/1326Issue Tracking, Patch
https://github.com/libexpat/libexpat/pull/1329Issue Tracking, Patch

Timeline

Published: Aug 20, 2026
Last modified: Sep 8, 2026
NVD status: Analyzed

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