Source: python-hpack Version: 4.0.0-3 Severity: important Tags: security upstream X-Debbugs-Cc: [email protected], Debian Security Team <[email protected]>
Hi, The following vulnerability was published for python-hpack. CVE-2026-59980[0]: | hpack is an HTTP/2 Header Encoding for Python. Prior to version | 4.2.0, 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 is available in python-hyper/hpack v4.2.0 | to restricted variable integer decoding to uint32 to prevent run- | away computation. As a workaround, sanitize input to hpack decoder | for long sequences of `0xFF` values to prevent malicious use. If you fix the vulnerability please also make sure to include the CVE (Common Vulnerabilities & Exposures) id in your changelog entry. For further information see: [0] https://security-tracker.debian.org/tracker/CVE-2026-59980 https://www.cve.org/CVERecord?id=CVE-2026-59980 [1] https://github.com/python-hyper/hpack/security/advisories/GHSA-8v8h-hg4w-mvq2 [2] https://github.com/python-hyper/hpack/commit/8cfb02c547740e16dbfe7aba77bad84b297cec2c Please adjust the affected versions in the BTS as needed. Regards, Salvatore
