# CVE-2026-97687: urllib3: HTTPS proxy TLS configuration may be ignored or overridden CVE-2026-97687 is fixed in 5 products on 1 platform, first by python3-urllib3 2.6.3-1ubuntu1.2, released September 29, 2026. It is not reported as exploited. Patch Radar priority: High. - Web page: https://patchblox.com/security/cve/CVE-2026-97687 - Priority: High - CVSS: 8.1 (Important) - EPSS: 0.0021 - CISA KEV: not listed - Exploited (vendor report): no - Publicly disclosed: no - Published: Sep 29, 2026 - Weakness: Improper Certificate Validation - Vendor advisory: https://msrc.microsoft.com/update-guide/vulnerability/CVE-2026-97687 ## Description Python is an interpreted, interactive, object-oriented programming language, which includes modules, classes, exceptions, very high level dynamic data types and dynamic typing. Python supports interfaces to many system calls and libraries, as well as to various windowing systems. Security Fix(es): * urllib3: urllib3: Denial of Service via unbounded memory allocation in chunk parser (CVE-2026-97689) * urllib3: urllib3: Traffic interception via HTTPS proxy TLS configuration override (CVE-2026-97687) For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section. ## Where it's fixed | Platform | Product | Fixed in | Fix | Released | |---|---|---|---|---| | Linux | python-urllib3 Debian 14 | 2.8.0-1 | [DEBIAN-CVE-2026-97687](https://patchblox.com/security/data/fix/linux/debian-cve-2026-97687.md) | Sep 30, 2026 | | Linux | python-urllib3 RHEL 10 | 1.26.19-4.el10_2.2 | [RHSA-2026:85930](https://patchblox.com/security/data/fix/linux/rhsa-2026-85930.md) | Sep 29, 2026 | | Linux | python-urllib3 opensuse-leap 16.0 | 2.5.0-160000.8.1 | [OPENSUSE-SU-2026:22071-1](https://patchblox.com/security/data/fix/linux/opensuse-su-2026-22071-1.md) | Nov 7, 2026 | | Linux | python-urllib3 rocky 10 | 0:1.26.19-4.el10_2.2 | [RLSA-2026:85930](https://patchblox.com/security/data/fix/linux/rlsa-2026-85930.md) | Nov 7, 2026 | | Linux | python-urllib3 rocky 9 | 0:1.26.5-8.el9_8.2 | [RLSA-2026:90494](https://patchblox.com/security/data/fix/linux/rlsa-2026-90494.md) | Nov 7, 2026 | | Linux | python-urllib3 sles 15.6 | 2.0.7-150400.7.36.1 | [SUSE-SU-2026:4704-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4704-1.md) | Nov 7, 2026 | | Linux | python-urllib3 sles 15.7 | 2.0.7-150400.7.36.1 | [SUSE-SU-2026:4704-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4704-1.md) | Nov 7, 2026 | | Linux | python-urllib3 sles 16.0 | 2.5.0-160000.8.1 | [SUSE-SU-2026:24217-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-24217-1.md) | Nov 7, 2026 | | Linux | python-urllib3_1 sles 15.6 | 1.26.18-150600.3.14.1 | [SUSE-SU-2026:4948-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4948-1.md) | Nov 7, 2026 | | Linux | python-urllib3_1 sles 15.7 | 1.26.18-150600.3.14.1 | [SUSE-SU-2026:4948-1](https://patchblox.com/security/data/fix/linux/suse-su-2026-4948-1.md) | Nov 7, 2026 | | Linux | python3-urllib3 RHEL 9 | 0:1.26.5-8.el9_8.2 | [RHSA-2026:90494](https://patchblox.com/security/data/fix/linux/rhsa-2026-90494.md) | Oct 29, 2026 | | Linux | python3-urllib3 Ubuntu 26.04.1 LTS (resolute) | 2.6.3-1ubuntu1.2 | [python3-urllib3 2.6.3-1ubuntu1.2](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-python3-urllib3-2.6.3-1ubuntu1.2.md) | Sep 29, 2026 | | Linux | python3-urllib3 almalinux 10 | 1.26.19-4.el10_2.2 | [ALSA-2026:85930](https://patchblox.com/security/data/fix/linux/alsa-2026-85930.md) | Nov 7, 2026 | | Linux | python3-urllib3 almalinux 9 | 1.26.5-8.el9_8.2 | [ALSA-2026:90494](https://patchblox.com/security/data/fix/linux/alsa-2026-90494.md) | Nov 7, 2026 | | Linux | python3-urllib3 ol 10 | 0:1.26.19-4.el10_2.2 | [ELSA-2026-85930](https://patchblox.com/security/data/fix/linux/elsa-2026-85930.md) | Nov 7, 2026 | | Linux | python3-urllib3 ol 9 | 0:1.26.5-8.el9_8.2 | [ELSA-2026-90494](https://patchblox.com/security/data/fix/linux/elsa-2026-90494.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 RHEL 8 | 0:1.26.19-5.el8_10 | [RHSA-2026:92474](https://patchblox.com/security/data/fix/linux/rhsa-2026-92474.md) | Oct 30, 2026 | | Linux | python3.12-urllib3 RHEL 9 | 0:1.26.19-3.el9_8.2 | [RHSA-2026:85929](https://patchblox.com/security/data/fix/linux/rhsa-2026-85929.md) | Oct 21, 2026 | | Linux | python3.12-urllib3 almalinux 8 | 1.26.19-5.el8_10 | [ALSA-2026:92474](https://patchblox.com/security/data/fix/linux/alsa-2026-92474.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 almalinux 9 | 1.26.19-3.el9_8.2 | [ALSA-2026:85929](https://patchblox.com/security/data/fix/linux/alsa-2026-85929.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 ol 8 | 0:1.26.19-5.el8_10 | [ELSA-2026-92474](https://patchblox.com/security/data/fix/linux/elsa-2026-92474.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 ol 9 | 0:1.26.19-3.el9_8.2 | [ELSA-2026-85929](https://patchblox.com/security/data/fix/linux/elsa-2026-85929.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 rocky 8 | 0:1.26.19-5.el8_10 | [RLSA-2026:92474](https://patchblox.com/security/data/fix/linux/rlsa-2026-92474.md) | Nov 7, 2026 | | Linux | python3.12-urllib3 rocky 9 | 0:1.26.19-3.el9_8.2 | [RLSA-2026:85929](https://patchblox.com/security/data/fix/linux/rlsa-2026-85929.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 RHEL 10 | 2.6.3-2.el10_2.6 | [RHSA-2026:84578](https://patchblox.com/security/data/fix/linux/rhsa-2026-84578.md) | Oct 19, 2026 | | Linux | python3.14-urllib3 RHEL 9 | 0:2.6.3-2.el9_8.6 | [RHSA-2026:84577](https://patchblox.com/security/data/fix/linux/rhsa-2026-84577.md) | Oct 19, 2026 | | Linux | python3.14-urllib3 almalinux 10 | 2.6.3-2.el10_2.6 | [ALSA-2026:84578](https://patchblox.com/security/data/fix/linux/alsa-2026-84578.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 almalinux 9 | 2.6.3-2.el9_8.6 | [ALSA-2026:84577](https://patchblox.com/security/data/fix/linux/alsa-2026-84577.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 ol 10 | 0:2.6.3-2.el10_2.6 | [ELSA-2026-84578](https://patchblox.com/security/data/fix/linux/elsa-2026-84578.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 ol 9 | 0:2.6.3-2.el9_8.6 | [ELSA-2026-84577](https://patchblox.com/security/data/fix/linux/elsa-2026-84577.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 rocky 10 | 0:2.6.3-2.el10_2.6 | [RLSA-2026:84578](https://patchblox.com/security/data/fix/linux/rlsa-2026-84578.md) | Nov 7, 2026 | | Linux | python3.14-urllib3 rocky 9 | 0:2.6.3-2.el9_8.6 | [RLSA-2026:84577](https://patchblox.com/security/data/fix/linux/rlsa-2026-84577.md) | Nov 7, 2026 | --- Data as of 2026-11-09T07:25:28Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo Free to use with attribution: show "Data: Patchblox Patch Radar" with a link to https://patchblox.com/security/patch-radar. Terms, including what needs a written agreement: https://patchblox.com/security/patch-radar/use-the-data Product names, logos and trademarks shown on Patch Radar belong to their respective owners. They are used only to identify the software each security fix applies to and to help readers find their platform. Their use does not imply any affiliation with, or endorsement by, those owners, and Patchblox is not affiliated with any of them.