ESB-2026.5856

=========================================================================== AUSCERT External Security Bulletin Redistribution ESB-2026.5856 USN-8344-1: pip vulnerabilities 29 May 2026 =========================================================================== AUSCERT Security Bulletin Summary --------------------------------- Product: pip Publisher: Ubuntu Operating System: Ubuntu Resolution: Patch/Upgrade CVE Names: CVE-2025-66471 CVE-2024-35195 CVE-2025-66418 Original Bulletin: https://ubuntu.com/security/notices/USN-8344-1 Comment: CVSS (Max): 7.5 CVE-2025-66471 (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H) CVSS Source: Ubuntu, [NIST] Calculator: https://www.first.org/cvss/calculator/3.1#CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H EPSS (Max): 0.0% (14th) CVE-2024-35195 2026-05-28 - --------------------------BEGIN INCLUDED TEXT-------------------- USN-8344-1: pip vulnerabilities Publication date 28 May 2026 Overview Several security issues were fixed in pip. Releases 26.04 LTS 24.04 LTS 22.04 LTS --------------------------------------------------------------------------------- Open side navigation Packages o python-pip - Python package installer Details It was discovered that pip incorrectly handled TLS certificate verification in session connections. If a session was first used with certificate verification disabled, subsequent requests to the same host would also skip verification regardless of the session's current settings. A remote attacker could possibly use this issue to perform a machine-in-the-middle attack and expose sensitive information. ( CVE-2024-35195 ) It was discovered that pip's bundled urllib3 library did not limit the number of decompression steps when processing HTTP responses. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. ( CVE-2025-66418 ) It was discovered that pip's bundled urllib3 library improperly handled streaming decompression of highly compressed data. A remote attacker could possibly use this issue to cause pip to consume excessive resources, leading to a denial of service. ( CVE-2025-66471 ) --------------------------------------------------------------------------------- Update instructions The problem can be corrected by updating your system to the following package versions: Ubuntu Package Version Release python3-pip - 25.1.1+dfsg-1ubuntu2+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 26.04 LTS available in the future. resolute python3-pip-whl - 25.1.1+dfsg-1ubuntu2+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. python3-pip - 24.0+dfsg-1ubuntu1.3+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 24.04 LTS available in the future. noble python3-pip-whl - 24.0+dfsg-1ubuntu1.3+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. python3-pip - 22.0.2+dfsg-1ubuntu0.7+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly 22.04 LTS available in the future. jammy python3-pip-whl - 22.0.2+dfsg-1ubuntu0.7+esm1 Ubuntu Pro Fix available with Ubuntu Pro via ESM Apps. A community fix might become publicly available in the future. --------------------------------------------------------------------------------- References o CVE-2025-66471 o CVE-2025-66418 o CVE-2024-35195 Related notices o USN-8010-1 o USN-7927-1 o USN-7927-2 o USN-7927-3 - --------------------------END INCLUDED TEXT---------------------- You have received this e-mail bulletin as a result of your organisation's registration with AUSCERT. 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