Most recent entries from all

bdu:2026-11379

BELL-CVE-2026-27459

Affected: Alpaquita:25: py3-openssl, Alpaquita:stream: py3-openssl

BREW-aws-sam-cli-CVE-2026-27459 — pyOpenSSL DTLS cookie callback buffer overflow

Affected: Homebrew: aws-sam-cli

If a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer.

Cookie values that are too long are now rejected.

certfr-2026-avi-0341 — De multiples vulnérabilités ont été découvertes dans les produits Microsoft. Elles permettent à un attaquant de provoqu…

certfr-2026-avi-0341

Withdrawn: CLEANSTART-2026-AZ09261 — Security fixes for CVE-2023-46136, CVE-2024-12797, CVE-2024-34069, CVE-2024-49766, CVE-2024-49767, CVE-2025-62727, CVE-…

Withdrawn by the publisher.

Affected: CleanStart: airflow-3

Multiple security vulnerabilities affect the airflow-3 package. These issues are resolved in later releases. See references for individual vulnerability details.

EUVD-2026-366755

fkie_cve-2026-27459

pyOpenSSL is a Python wrapper around the OpenSSL library. Starting in version 22.0.0 and prior to version 26.0.0, if a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer. Starting in version 26.0.0, cookie values that are too long are now rejected.

GHSA-5pwr-322w-8jr4 — pyOpenSSL DTLS cookie callback buffer overflow

Affected: PyPI: pyopenssl

If a user provided callback to `set_cookie_generate_callback` returned a cookie value greater than 256 bytes, pyOpenSSL would overflow an OpenSSL provided buffer.

Cookie values that are too long are now rejected.

msrc_CVE-2026-27459 — pyOpenSSL DTLS cookie callback buffer overflow

msrc_CVE-2026-27459

OESA-2026-1729 — pyOpenSSL security update

Affected: openEuler:24.03-LTS-SP1: pyOpenSSL

pyOpenSSL is a rather thin wrapper around (a subset of) the OpenSSL library. With thin wrapper we mean that a lot of the object methods do nothing more than calling a corresponding function in the OpenSSL library. Security Fix(es):

A security vulnerability exists in the PyOpenSSL library's `set_tlsext_servername_callback` function. When a user-provided callback function raises an unhandled exception, the connection would still be accepted. If a user relies on this callback for any security-sensitive behavior (such as server name-based access control or certificate validation), this vulnerability could allow the security mechanism to be bypassed, potentially permitting unauthorized connections or access.(CVE-2026-27448)

openSUSE-SU-2026:10392-1 — python311-pyOpenSSL-26.0.0-1.1 on GA media

python311-pyOpenSSL-26.0.0-1.1 on GA media

PYSEC-2026-2269

Affected: PyPI: pyopenssl

RHSA-2026:10754 — Red Hat Security Advisory: RHUI 4.11.4 security update - python-pyOpenSSL

pyOpenSSL: DTLS cookie callback buffer overflow

SUSE-EL-9-CLIENT-TOOLS-2026-2255 — Security update 5.0.8 for Multi-Linux Manager Salt Bundle

Security update 5.0.8 for Multi-Linux Manager Salt Bundle

UBUNTU-CVE-2026-27459

Affected: Ubuntu:24.04:LTS: pyopenssl, Ubuntu:25.10: pyopenssl

WID-SEC-W-2026-1183 — Red Hat Hardened Images RPMs (jq und pyOpenSSL): Mehrere Schwachstellen

Ein entfernter, anonymer Angreifer kann mehrere Schwachstellen in Red Hat Red Hat Hardened Images RPMs ausnutzen, um Sicherheitsvorkehrungen zu umgehen, einen Denial-of-Service-Zustand verursachen, vertrauliche Informationen offenlegen oder nicht näher spezifizierte Angriffe durchführen, einschließlich potenzieller Codeausführung.