Name: CVE-2026-76956: Unexpected Status Code or Return Value
Creator: Rapid7
Published: 2026-08-20T00:00:00.000Z
License: https://www.rapid7.com/legal/website-terms-of-use/
Keywords: CVE, CVE-2026-76956, CWE-394, CVSS 7.5, EPSS 0.00263

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.

CVSS Details

CVSS 3.1 Base Score: 7.5
CVSS 3.1 Vector: (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H)

Covered by Rapid7

Product	Vendor Advisory	Solution File	Added	Published
Alpine Linux	—	Upgrade expat	Sep 1, 2026	Aug 20, 2026
Debian	—	Upgrade expat	Oct 20, 2026	Aug 20, 2026
Ibm Aix	—	Apply the fix or workaround for python_advisory21	Sep 15, 2026	Sep 15, 2026

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CVSS Details

Covered by Rapid7

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