CVE-2026-21441
HighAdvisory
Published 7 Jan 2026In the index since 5 Sept 2026
- Severity
- High
- worst across findings
- CVSS
- 8.9
- base score, highest
- EPSS
- 0.030
- 86th percentile
- CISA KEV
- Not listed
- no confirmed exploitation
- Charts affected
- 836
- of 17,787 indexed, latest versions
- Container images
- 893
- deployed by those charts
- Fix available
- 5 of 5
- affected packages
Decompression-bomb safeguards bypassed when following HTTP redirects (streaming API)
Carried by container images the latest versions of 836 of 17,787 indexed charts deploy, on 893 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| py3-pipapk | 25.0.1-r0, 25.2-r0, 26.0.1-r1 | 26.1.1-r0 | 3 |
| urllib3pypi | 1.22, 1.23, 1.24, 1.24.1+47 more | 2.6.3 | 864 |
| python-pipdeb | 9.0.1-2.3~ubuntu1, 9.0.1-2.3~ubuntu1.18.04.1, 9.0.1-2.3~ubuntu1.18.04.2, 9.0.1-2.3~ubuntu1.18.04.4+14 more | 9.0.1-2.3~ubuntu1.18.04.8+esm8 | 60 |
| python-urllib3deb | 1.22-1ubuntu0.18.04.1, 1.22-1ubuntu0.18.04.2, 1.25.8-2ubuntu0.1, 1.25.8-2ubuntu0.2+8 more | 1.25.8-2ubuntu0.4+esm3, 1.26.5-1~exp1+deb11u3, 1.26.5-1~exp1ubuntu0.5, 1.26.12-1+deb12u3+1 more | 52 |
| py3-urllib3apk | 1.26.18-r1, 1.26.20-r0 | 1.26.18-r2, 1.26.20-r1 | 4 |
- OSV records
- ALPINE-CVE-2026-21441CGA-295m-5rcj-2qm6CGA-7cp6-w84v-cpfxDEBIAN-CVE-2026-21441GHSA-38jv-5279-wg99UBUNTU-CVE-2026-21441DLA-4446-1
- Also known as
- CGA-hqjr-j69p-ch46, CGA-rh7x-c7j6-9qqm, DSA-6102-2, PYSEC-2026-1996, USN-7955-1, USN-7955-2, USN-8010-1
Charts affected
836 by stars
Container images carrying it
893 by charts deploying them
A fixed version is listed for 5 of the 5 affected packages.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| library/ | 04ac44a2595b | urllib3 | 2.6.3 | 1 |
| librenms/ | 4f1f3d667cc7 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | f7d7c7704249 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | e36d16f7341c | urllib3 | 2.6.3 | 1 |
| linuxserver/ | 241009026e6f | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| linuxserver/ | 938810eca3d3 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | 89cd8d5fb1ac | urllib3 | 2.6.3 | 1 |
| linuxserver/ | c4d2766b9eb7 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | 0ac871624394 | python-urllib3 urllib3 | no fix listed 2.6.3 | 1 |
| linuxserver/ | 2ce561a95e7b | python-urllib3 urllib3 | no fix listed 2.6.3 | 1 |
| linuxserver/ | 50792a72fc71 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | 94696dab3c50 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | f93d2560e233 | urllib3 | 2.6.3 | 1 |
| linuxserver/ | 4477fb1ce3ca | urllib3 | 2.6.3 | 1 |
| linuxserver/ | e48b479c1891 | urllib3 | 2.6.3 | 1 |
| litellm/ | 09b217802ded | py3-pip | 26.1.1-r0 | 1 |
| lnbitsdocker/ | 26fae6327477 | urllib3 | 2.6.3 | 1 |
| lnbitsdocker/ | a11aaa6d2b21 | urllib3 | 2.6.3 | 1 |
| lncm/ | bca14d04397d | urllib3 | 2.6.3 | 1 |
| localstack/ | 9d278167f2b7 | urllib3 | 2.6.3 | 1 |
| locustio/ | 51d866285170 | urllib3 | 2.6.3 | 1 |
| logiqai/ | 55a574ec5b64 | urllib3 | 2.6.3 | 1 |
| louislam/ | 059b49d64739 | urllib3 | 2.6.3 | 1 |
| louislam/ | 0b55bcb83a1c | urllib3 | 2.6.3 | 1 |
| louislam/ | 3d632903e6af | urllib3 | 2.6.3 | 1 |
| louislam/ | 3e24e96c89ef | urllib3 | 2.6.3 | 1 |
| louislam/ | 4c364ef96aad | python-urllib3 urllib3 | 1.26.12-1+deb12u3 2.6.3 | 1 |
| louislam/ | 91e963bfda56 | urllib3 | 2.6.3 | 1 |
| louislam/ | 96510915e6be | urllib3 | 2.6.3 | 1 |
| louislam/ | 9865163f92c1 | python-urllib3 urllib3 | 1.26.12-1+deb12u3 2.6.3 | 1 |
| louislam/ | a4eab252e5a2 | urllib3 | 2.6.3 | 1 |
| louislam/ | a84767d7934f | urllib3 | 2.6.3 | 1 |
| louislam/ | bc6f244ecf27 | urllib3 | 2.6.3 | 1 |
| lsstdm/ | 74c97a490940 | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | 4143c7cd705e | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | b75bf8aaafa4 | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | 19c2dfc4e4ff | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | 5e0ade6bed1c | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | 4879415ec6ac | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | e139fde946d7 | urllib3 | 2.6.3 | 1 |
| lsstsqre/ | e9feb99f524d | urllib3 | 2.6.3 | 1 |
| makersquad/ | a40dd258c527 | python-urllib3 urllib3 | 1.26.12-1+deb12u3 2.6.3 | 1 |
| matrixdotorg/ | c3c4a9de2a0b | urllib3 | 2.6.3 | 1 |
| matrixdotorg/ | cb89c0f17ba1 | urllib3 | 2.6.3 | 1 |
| matrixdotorg/ | def97fd537d8 | urllib3 | 2.6.3 | 1 |
| mediagis/ | 7923a8e67197 | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| mediagis/ | c15e941485ef | urllib3 | 2.6.3 | 1 |
| mediagis/ | d0eae7b51374 | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| milesmcc/ | ba54f7797a6b | urllib3 | 2.6.3 | 1 |
| milesmcc/ | e821e31140f7 | urllib3 | 2.6.3 | 1 |