Unexpected Status Code or Return Value Affecting expat package, versions *


Severity

Recommended
low

Based on default assessment until relevant scores are available.

Threat Intelligence

EPSS
0.26% (19th percentile)

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  • Snyk IDSNYK-DEBIANUNSTABLE-EXPAT-19012848
  • published20 Aug 2026
  • disclosed20 Aug 2026

Introduced: 20 Aug 2026

NewCVE-2026-76956  (opens in a new tab)
CWE-394  (opens in a new tab)

How to fix?

There is no fixed version for Debian:unstable expat.

NVD Description

Note: Versions mentioned in the description apply only to the upstream expat package and not the expat package as distributed by Debian. See How to fix? for Debian:unstable relevant fixed versions and status.

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.