OESA-2026-4239

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Source

https://www.openeuler.org/en/security/security-bulletins/detail/?id=openEuler-SA-2026-4239

Import Source

https://repo.openeuler.org/security/data/osv/OESA-2026-4239.json

JSON Data

https://api.osv.dev/v1/vulns/OESA-2026-4239

Upstream

CVE-2026-59980

Published

2026-10-16T11:58:29Z

Modified

2026-10-16T12:15:16Z

Severity

6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N CVSS Calculator

Summary

python-hpack security update

Details

hpack provides a simple Python interface to the HPACK compression algorithm,used to compress HTTP headers in HTTP/2.Used by some of the most populer HTTP/2 implementations in Python,HPACK offers a great Python interface as well as optional upgrade to optimised C-based compression routines from nghttp2.

Security Fix(es):

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.(CVE-2026-59980)

Database specific

{
    "severity":  "Medium"
}

References

Affected packages

openEuler:22.03-LTS-SP4 / python-hpack

Package

Name: python-hpack
Purl: pkg:rpm/openEuler/python-hpack&distro=openEuler-22.03-LTS-SP4

Affected ranges

Type: ECOSYSTEM
Events: Introduced

0 Unknown introduced version / All previous versions are affected

Fixed

4.0.0-2.oe2203sp4

Ecosystem specific

{
    "noarch":  [
        "python3-hpack-4.0.0-2.oe2203sp4.noarch.rpm"
    ],
    "src":  [
        "python-hpack-4.0.0-2.oe2203sp4.src.rpm"
    ]
}

Database specific

source

"https://repo.openeuler.org/security/data/osv/OESA-2026-4239.json"