CVE catalog
CVE-2025-66418
pip vulnerabilities
- Severity
- High · CVSS 8.9
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.68% · Oct 25, 2026
urllib3 is a user-friendly HTTP client library for Python. Starting in version 1.24 and prior to 2.6.0, the number of links in the decompression chain was unbounded allowing a malicious server to insert a virtually unlimited number of compression steps leading to high CPU usage and massive memory allocation for the decompressed data. This vulnerability is fixed in 2.6.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | python-urllib3 | sid | 2.8.0-2 | fixed |
| Debian | python-urllib3 | forky | 2.8.0-2 | fixed |
| Debian | python-urllib3 | trixie | 2.3.0-3+deb13u2 | fixed |
| Debian | python-urllib3 | trixie-security | 2.3.0-3+deb13u2 | fixed |
| Debian | python-urllib3 | bookworm | 1.26.12-1+deb12u4 | fixed |
| Debian | python-urllib3 | bookworm-security | 1.26.12-1+deb12u4 | fixed |
| Ubuntu | python-pip | noble | 24.0+dfsg-1ubuntu1.3+esm1 | fixed |
| Ubuntu | python3-pip | noble | 24.0+dfsg-1ubuntu1.3+esm1 | fixed |
| Ubuntu | python3-pip-whl | noble | 24.0+dfsg-1ubuntu1.3+esm1 | fixed |
| Ubuntu | python-urllib3 | noble | 2.0.7-1ubuntu0.3 | fixed |
| Ubuntu | python3-urllib3 | noble | 2.0.7-1ubuntu0.3 | fixed |
| PyPI | urllib3 | Not reported | 2.6.0 | fixed |
| Cpe | urllib3 | Not reported | 2.6.0 | fixed |
| Alpine | py3-urllib3 | 3.23 | 2.6.3-r0 | fixed |
| Suse | python-urllib3 | linux enterprise high performance computing 15 sp4-espos | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise high performance computing 15 sp4-ltss | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise high performance computing 15 sp5-espos | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise high performance computing 15 sp5-ltss | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server 15 sp4-ltss | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server 15 sp5-ltss | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server 15 sp6-ltss | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server for sap applications 15 sp4 | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server for sap applications 15 sp5 | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise server for sap applications 15 sp6 | 2.0.7-150400.7.27.1 | fixed |
| Ubuntu | python-urllib3 | pro | 1.24.1-1ubuntu1 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.24.1-1ubuntu2 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-1 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.1 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.2 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.3 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.4 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.4+esm1 | vulnerable |
| Ubuntu | python-urllib3 | pro | 1.25.8-2ubuntu0.4+esm2 | fixed |
| Ubuntu | python-urllib3 | 22.04 | 1.26.5-1~exp1 | vulnerable |
| Ubuntu | python-urllib3 | 22.04 | 1.26.5-1~exp1ubuntu0.1 | vulnerable |
| Ubuntu | python-urllib3 | 22.04 | 1.26.5-1~exp1ubuntu0.2 | vulnerable |
| Ubuntu | python-urllib3 | 22.04 | 1.26.5-1~exp1ubuntu0.3 | vulnerable |
| Ubuntu | python-urllib3 | 22.04 | 1.26.5-1~exp1ubuntu0.4 | fixed |
| Ubuntu | python-urllib3 | 24.04 | 1.26.16-1 | vulnerable |
| Ubuntu | python-urllib3 | 24.04 | 1.26.18-1 | vulnerable |
| Ubuntu | python-urllib3 | 24.04 | 2.0.7-1 | vulnerable |
| Ubuntu | python-urllib3 | 24.04 | 2.0.7-1ubuntu0.1 | vulnerable |
| Ubuntu | python-urllib3 | 24.04 | 2.0.7-1ubuntu0.2 | vulnerable |
| Ubuntu | python-urllib3 | 24.04 | 2.0.7-1ubuntu0.3 | fixed |
| Ubuntu | python-urllib3 | 25.10 | 2.3.0-2 | vulnerable |
| Ubuntu | python-urllib3 | 25.10 | 2.3.0-2ubuntu1 | vulnerable |
| Ubuntu | python-urllib3 | 25.10 | 2.3.0-3 | vulnerable |
| Ubuntu | python-urllib3 | 25.10 | 2.3.0-3ubuntu0.1 | fixed |
| Suse | python-urllib3 | linux enterprise module for public cloud 12 | 1.25.10-3.48.4 | fixed |
| Suse | python-urllib3 | linux enterprise server ltss extended security 12 sp5 | 1.25.10-3.48.4 | fixed |
| Opensuse | python-oci-sdk | tumbleweed | 2.168.3-1.1 | fixed |
| Opensuse | python-urllib3_1 | leap 16.0 | 1.26.20-160000.3.1 | fixed |
| Opensuse | python-urllib3 | leap 16.0 | 2.5.0-160000.4.1 | fixed |
| Opensuse | python-urllib3_1 | tumbleweed | 1.26.20-5.1 | fixed |
| Opensuse | python-urllib3 | tumbleweed | 2.6.2-1.1 | fixed |
| Suse | python-urllib3_1 | linux enterprise server 16.0 | 1.26.20-160000.3.1 | fixed |
| Suse | python-urllib3_1 | linux enterprise server for sap applications 16.0 | 1.26.20-160000.3.1 | fixed |
| Suse | python-urllib3 | linux micro 6.1 | 2.1.0-slfo.1.1_4.1 | fixed |
| Suse | python-urllib3 | linux micro 6.0 | 2.1.0-5.1 | fixed |
| Suse | python-urllib3 | linux enterprise server 16.0 | 2.5.0-160000.4.1 | fixed |
| Suse | python-urllib3 | linux enterprise server for sap applications 16.0 | 2.5.0-160000.4.1 | fixed |
| Suse | python-urllib3 | linux micro 6.2 | 2.5.0-160000.4.1 | fixed |
| Suse | python-urllib3 | linux enterprise micro 5.3 | 1.25.10-150300.4.21.1 | fixed |
| Suse | python-urllib3 | linux enterprise micro 5.4 | 1.25.10-150300.4.21.1 | fixed |
| Suse | python-urllib3 | linux enterprise micro 5.5 | 1.25.10-150300.4.21.1 | fixed |
| Suse | python-urllib3 | linux enterprise module for basesystem 15 sp7 | 1.25.10-150300.4.21.1 | fixed |
| Suse | python-urllib3 | linux enterprise micro 5.2 | 1.25.10-150300.4.21.1 | fixed |
| Suse | python-urllib3 | linux enterprise module for public cloud 15 sp4 | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3 | linux enterprise module for python 3 15 sp7 | 2.0.7-150400.7.27.1 | fixed |
| Opensuse | python-urllib3 | leap 15.6 | 2.0.7-150400.7.27.1 | fixed |
| Suse | python-urllib3_1 | linux enterprise module for python 3 15 sp7 | 1.26.18-150600.3.6.1 | fixed |
| Opensuse | python-urllib3_1 | leap 15.6 | 1.26.18-150600.3.6.1 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | python-urllib3 | source | sid | 2.5.0-1.1 | not yet assigned | Not reported | [1122030] |
| Debian | python-urllib3 | source | forky | 2.5.0-1.1 | not yet assigned | Not reported | [1122030] |
| Debian | python-urllib3 | source | trixie | 2.3.0-3+deb13u1 | not yet assigned | Not reported | [1122030] |
| Debian | python-urllib3 | source | bookworm | 1.26.12-1+deb12u2 | not yet assigned | Not reported | [1122030] |
| Ubuntu | python-pip | deb | noble | 24.0+dfsg-1ubuntu1.3+esm1 | Not reported | Not reported | Not reported |
| Ubuntu | python3-pip | deb | noble | 24.0+dfsg-1ubuntu1.3+esm1 | Not reported | Not reported | Not reported |
| Ubuntu | python3-pip-whl | deb | noble | 24.0+dfsg-1ubuntu1.3+esm1 | Not reported | Not reported | Not reported |
| Ubuntu | python-urllib3 | deb | noble | 2.0.7-1ubuntu0.3 | Not reported | Not reported | Not reported |
| Ubuntu | python3-urllib3 | deb | noble | 2.0.7-1ubuntu0.3 | Not reported | Not reported | Not reported |
| PyPI | urllib3 | PyPI | Not reported | 2.6.0 | Not reported | GHSA-GM62-XV2J-4W53 | Not reported |
| Cpe | urllib3 | cpe | Not reported | 2.6.0 | Not reported | NVD-CVE-2025-66418 | Not reported |
| Alpine | py3-urllib3 | apk | 3.23 | 2.6.3-r0 | Not reported | ALPINE-CVE-2025-66418 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise high performance computing 15 sp4-espos | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise high performance computing 15 sp4-ltss | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise high performance computing 15 sp5-espos | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise high performance computing 15 sp5-ltss | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server 15 sp4-ltss | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server 15 sp5-ltss | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server 15 sp6-ltss | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server for sap applications 15 sp4 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server for sap applications 15 sp5 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server for sap applications 15 sp6 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-2 | Not reported |
| Ubuntu | python-urllib3 | deb | pro | 1.25.8-2ubuntu0.4+esm2 | Not reported | USN-7927-1 | Not reported |
| Ubuntu | python-urllib3 | deb | 22.04 | 1.26.5-1~exp1ubuntu0.4 | Not reported | USN-7927-1 | Not reported |
| Ubuntu | python-urllib3 | deb | 24.04 | 2.0.7-1ubuntu0.3 | Not reported | USN-7927-1 | Not reported |
| Ubuntu | python-urllib3 | deb | 25.10 | 2.3.0-3ubuntu0.1 | Not reported | USN-7927-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise module for public cloud 12 | 1.25.10-3.48.4 | Not reported | SUSE-SU-2026:1412-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server ltss extended security 12 sp5 | 1.25.10-3.48.4 | Not reported | SUSE-SU-2026:1412-1 | Not reported |
| Opensuse | python-oci-sdk | rpm | tumbleweed | 2.168.3-1.1 | Not reported | OPENSUSE-SU-2026:10431-1 | Not reported |
| Opensuse | python-urllib3_1 | rpm | leap 16.0 | 1.26.20-160000.3.1 | Not reported | OPENSUSE-SU-2026:20271-1 | Not reported |
| Opensuse | python-urllib3 | rpm | leap 16.0 | 2.5.0-160000.4.1 | Not reported | OPENSUSE-SU-2026:20127-1 | Not reported |
| Opensuse | python-urllib3_1 | rpm | tumbleweed | 1.26.20-5.1 | Not reported | OPENSUSE-SU-2026:10096-1 | Not reported |
| Opensuse | python-urllib3 | rpm | tumbleweed | 2.6.2-1.1 | Not reported | OPENSUSE-SU-2026:10026-1 | Not reported |
| Suse | python-urllib3_1 | rpm | linux enterprise server 16.0 | 1.26.20-160000.3.1 | Not reported | SUSE-SU-2026:20591-1 | Not reported |
| Suse | python-urllib3_1 | rpm | linux enterprise server for sap applications 16.0 | 1.26.20-160000.3.1 | Not reported | SUSE-SU-2026:20591-1 | Not reported |
| Suse | python-urllib3 | rpm | linux micro 6.1 | 2.1.0-slfo.1.1_4.1 | Not reported | SUSE-SU-2026:20485-1 | Not reported |
| Suse | python-urllib3 | rpm | linux micro 6.0 | 2.1.0-5.1 | Not reported | SUSE-SU-2026:20443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server 16.0 | 2.5.0-160000.4.1 | Not reported | SUSE-SU-2026:20189-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise server for sap applications 16.0 | 2.5.0-160000.4.1 | Not reported | SUSE-SU-2026:20189-1 | Not reported |
| Suse | python-urllib3 | rpm | linux micro 6.2 | 2.5.0-160000.4.1 | Not reported | SUSE-SU-2026:20175-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise micro 5.3 | 1.25.10-150300.4.21.1 | Not reported | SUSE-SU-2026:0443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise micro 5.4 | 1.25.10-150300.4.21.1 | Not reported | SUSE-SU-2026:0443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise micro 5.5 | 1.25.10-150300.4.21.1 | Not reported | SUSE-SU-2026:0443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise module for basesystem 15 sp7 | 1.25.10-150300.4.21.1 | Not reported | SUSE-SU-2026:0443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise micro 5.2 | 1.25.10-150300.4.21.1 | Not reported | SUSE-SU-2026:0443-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise module for public cloud 15 sp4 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-1 | Not reported |
| Suse | python-urllib3 | rpm | linux enterprise module for python 3 15 sp7 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-1 | Not reported |
| Opensuse | python-urllib3 | rpm | leap 15.6 | 2.0.7-150400.7.27.1 | Not reported | SUSE-SU-2026:0367-1 | Not reported |
| Suse | python-urllib3_1 | rpm | linux enterprise module for python 3 15 sp7 | 1.26.18-150600.3.6.1 | Not reported | SUSE-SU-2026:0635-1 | Not reported |
| Opensuse | python-urllib3_1 | rpm | leap 15.6 | 1.26.18-150600.3.6.1 | Not reported | SUSE-SU-2026:0635-1 | Not reported |
OpenFactory catalog packages
[openSUSE Tumbleweed]
- [python313-oci-sdk]Unknown
Source package: [python-oci-sdk]
Details (1)
2.180.0-1.2· noarch · tumbleweedUnknown · Fixed:
2.168.3-1.1Version impact unknown
usn · python-oci-sdk · opensuse · tumbleweed
- [python313-urllib3]Unknown
Source package: [python-urllib3]
Details (1)
2.7.0-2.3· noarch · tumbleweedUnknown · Fixed:
2.6.2-1.1Version impact unknown
usn · python-urllib3 · opensuse · tumbleweed
- [python313-urllib3_1]Unknown
Source package: [python-urllib3_1]
Details (1)
1.26.20-7.2· noarch · tumbleweedUnknown · Fixed:
1.26.20-5.1Version impact unknown
usn · python-urllib3_1 · opensuse · tumbleweed
- [python314-oci-sdk]Unknown
Source package: [python-oci-sdk]
Details (1)
2.180.0-1.2· noarch · tumbleweedUnknown · Fixed:
2.168.3-1.1Version impact unknown
usn · python-oci-sdk · opensuse · tumbleweed
- [python314-urllib3]Unknown
Source package: [python-urllib3]
Details (1)
2.7.0-2.3· noarch · tumbleweedUnknown · Fixed:
2.6.2-1.1Version impact unknown
usn · python-urllib3 · opensuse · tumbleweed
- [python314-urllib3_1]Unknown
Source package: [python-urllib3_1]
Details (1)
1.26.20-7.2· noarch · tumbleweedUnknown · Fixed:
1.26.20-5.1Version impact unknown
usn · python-urllib3_1 · opensuse · tumbleweed
[Debian 12 (Bookworm)]
- [python3-urllib3]Fixed
Source package: [python-urllib3]
Details (4)
1.26.12-1+deb12u4· all · bookwormFixed · Fixed:
1.26.12-1+deb12u2usn · python-urllib3 · debian · bookworm; usn · python-urllib3 · debian · 12
1.26.12-1+deb12u4· all · bookwormFixed · Fixed:
1.26.12-1+deb12u2usn · python-urllib3 · debian · bookworm; usn · python-urllib3 · debian · 12
1.26.12-1+deb12u4· all · bookworm-securityFixed · Fixed:
1.26.12-1+deb12u2usn · python-urllib3 · debian · bookworm; usn · python-urllib3 · debian · 12
1.26.12-1+deb12u4· all · bookworm-securityFixed · Fixed:
1.26.12-1+deb12u2usn · python-urllib3 · debian · bookworm; usn · python-urllib3 · debian · 12
[Debian 13 (Trixie)]
- [python3-urllib3]Fixed
Source package: [python-urllib3]
Details (4)
2.3.0-3+deb13u2· all · trixieFixed · Fixed:
2.3.0-3+deb13u1usn · python-urllib3 · debian · 13
2.3.0-3+deb13u2· all · trixieFixed · Fixed:
2.3.0-3+deb13u1usn · python-urllib3 · debian · 13
2.3.0-3+deb13u2· all · trixie-securityFixed · Fixed:
2.3.0-3+deb13u1usn · python-urllib3 · debian · 13
2.3.0-3+deb13u2· all · trixie-securityFixed · Fixed:
2.3.0-3+deb13u1usn · python-urllib3 · debian · 13
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/suse-su-2026_0367-2.json]
- [https://nvd.nist.gov/vuln/detail/CVE-2025-66418]
- [https://osv.dev/vulnerability/ALPINE-CVE-2025-66418]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2025-66418]
- [https://osv.dev/vulnerability/DSA-6102-1]
- [https://osv.dev/vulnerability/GHSA-gm62-xv2j-4w53]
- [https://osv.dev/vulnerability/SUSE-SU-2026:0367-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:0367-2]
- [https://osv.dev/vulnerability/SUSE-SU-2026:0443-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:0635-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:1412-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:20175-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:20189-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:20443-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:20485-1]
- [https://osv.dev/vulnerability/SUSE-SU-2026:20591-1]
- [https://osv.dev/vulnerability/USN-7927-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10026-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10096-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:10431-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:20127-1]
- [https://osv.dev/vulnerability/openSUSE-SU-2026:20271-1]
- [https://security-tracker.debian.org/tracker/CVE-2025-66418]
- [https://security.access.redhat.com/data/csaf/v2/vex/2025/cve-2025-66418.json]
- [https://ubuntu.com/security/notices/USN-7927-1]
- [https://ubuntu.com/security/notices/USN-8344-1]
- [https://wid.cert-bund.de/.well-known/csaf/white/2025/wid-sec-w-2025-2927.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX] · [Ubuntu Security Notices (USN)]