CVE-2025-66418
Description
Important: python-urllib3 security update
Predictions
Heuristic predictions, AS-IS, for prioritization only.
Mitigations
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-1087.html
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-1089.html
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-1088.html
Vendor advisory: alma — https://errata.almalinux.org/9/ALSA-2026-1239.html
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-1241.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:1241
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-1240.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:1240
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-1226.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:1226
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-1224.html
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:1224
Vendor advisory: alma — https://errata.almalinux.org/8/ALSA-2026-1254.html
Vendor advisory: alma — https://bugzilla.redhat.com/2427726
Vendor advisory: alma — https://bugzilla.redhat.com/2419467
Vendor advisory: alma — https://bugzilla.redhat.com/2419455
Vendor advisory: alma — https://access.redhat.com/errata/RHSA-2026:1254
Vendor advisory: debian — https://security-tracker.debian.org/tracker/CVE-2025-66418
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1088
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1239
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1089
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1087
Vendor advisory: suse — https://www.suse.com/security/cve/CVE-2025-66418.html
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:1239
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:1089
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:1088
Vendor advisory: redhat — https://access.redhat.com/errata/RHSA-2026:1087
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1254
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1224
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1226
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1241
Vendor advisory: rocky — https://errata.rockylinux.org/RLSA-2026:1240
OS impact
| OS | Version | Status | Fixed in |
|---|---|---|---|
| rocky | 8 | fixed | |
| rhel | 9 | fixed | |
| sles | affected | | |
| rocky | 9 | fixed | |
| debian | bookworm | fixed | 1.26.12-1+deb12u2 |
| debian | bullseye | fixed | 1.26.5-1~exp1+deb11u2 |
| debian | forky | fixed | 2.5.0-1.1 |
| debian | sid | fixed | 2.5.0-1.1 |
| debian | trixie | fixed | 2.3.0-3+deb13u1 |
Package impact
| Ecosystem | Package | Vulnerable | Fixed |
|---|---|---|---|
| PyPI | urllib3 | >=1.24,<2.6.0 | 2.6.0 |
References
- https://errata.rockylinux.org/RLSA-2026:1240
- https://errata.rockylinux.org/RLSA-2026:1241
- https://errata.rockylinux.org/RLSA-2026:1226
- https://errata.rockylinux.org/RLSA-2026:1224
- https://errata.rockylinux.org/RLSA-2026:1254
- https://access.redhat.com/errata/RHSA-2026:1087
- https://access.redhat.com/errata/RHSA-2026:1088
- https://access.redhat.com/errata/RHSA-2026:1089
- https://access.redhat.com/errata/RHSA-2026:1239
- https://github.com/urllib3/urllib3/security/advisories/GHSA-gm62-xv2j-4w53
- https://nvd.nist.gov/vuln/detail/CVE-2025-66418
- https://github.com/urllib3/urllib3/commit/24d7b67eac89f94e11003424bcf0d8f7b72222a8
- https://github.com/urllib3/urllib3
- https://www.suse.com/security/cve/CVE-2025-66418.html
- https://errata.rockylinux.org/RLSA-2026:1087
- https://errata.rockylinux.org/RLSA-2026:1089
- https://errata.rockylinux.org/RLSA-2026:1239
- https://errata.rockylinux.org/RLSA-2026:1088
- https://security-tracker.debian.org/tracker/CVE-2025-66418
- https://access.redhat.com/errata/RHSA-2026:1254
- https://bugzilla.redhat.com/2419455
- https://bugzilla.redhat.com/2419467
- https://bugzilla.redhat.com/2427726
- https://errata.almalinux.org/8/ALSA-2026-1254.html
- https://access.redhat.com/errata/RHSA-2026:1224
Verify integrity in audit chain (admin only). AS-IS.