Advisories » MGASA-2026-0349

Updated python-hpack packages fix a security vulnerability

Publication date: 31 Aug 2026
Modification date: 31 Aug 2026
Type: security
Affected Mageia releases : 10
CVE: CVE-2026-59980

Description

Users of the python-hyper/hpack library, most commonly used as
downstream dependency of the python-hyper/h2 library (an HTTP/2 client
and server implementation). Unbounded variable integer decoding can
cause run-away computation on malformed input leading to O(n^2) runtime,
effectively blocking further processing with large enough unsanitized
input.
A fix python-hyper/hpack v4.2.0 restricts variable integer decoding to
uint32 to prevent run-away computation.
                

References

• https://bugs.mageia.org/show_bug.cgi?id=36197
• https://github.com/python-hyper/hpack/security/advisories/GHSA-8v8h-hg4w-mvq2
• https://www.cve.org/CVERecord?id=CVE-2026-59980

SRPMS

10/core

• python-hpack-4.2.0-1.mga10