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 |
|---|---|---|---|---|
| jupyterhub/ | 3974ba945e65 | python-pip | no fix listed | 1 |
| jupyterhub/ | 5a0ceed1300a | urllib3 | 2.6.3 | 1 |
| jupyterhub/ | b6b4a1a34bf0 | urllib3 | 2.6.3 | 1 |
| jupyterhub/ | e4770285aaf7 | urllib3 | 2.6.3 | 1 |
| jupyterhub/ | 8e4778efec8e | urllib3 | 2.6.3 | 1 |
| jupyterhub/ | e3e6f3051df8 | urllib3 | 2.6.3 | 1 |
| keitaro/ | 5bf1a45f45c1 | urllib3 | 2.6.3 | 1 |
| kelvinsp/ | cd33e6db2a59 | urllib3 | 2.6.3 | 1 |
| kennethreitz/ | 599fe5e50731 | python-pip | 9.0.1-2.3~ubuntu1.18.04.8+esm8 | 1 |
| kfirfer/ | cf81d0959256 | urllib3 | 2.6.3 | 1 |
| kfirfer/ | e88cfcec5c93 | urllib3 | 2.6.3 | 1 |
| kfirfer/ | 81e5c4e5d70e | urllib3 | 2.6.3 | 1 |
| kfirfer/ | 461331bd838e | urllib3 | 2.6.3 | 1 |
| kfserving/ | f322d6ffdfa3 | urllib3 | 2.6.3 | 1 |
| kinseii/ | 7160eb143728 | python-urllib3 urllib3 | 1.26.12-1+deb12u3 2.6.3 | 1 |
| kiwigrid/ | 3e86186656d3 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | 65095a82d4a1 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | 6eb52513d59e | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | 89739be9ff38 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | 899ccd0b1f54 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | af151f677a63 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | db85bd553253 | urllib3 | 2.6.3 | 1 |
| kiwigrid/ | e271016441af | urllib3 | 2.6.3 | 1 |
| knspar/ | 09499d2dc91a | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| knspar/ | 0c4f0543ee58 | urllib3 | 2.6.3 | 1 |
| kobotoolbox/ | b15679454415 | urllib3 | 2.6.3 | 1 |
| kobotoolbox/ | bcacc01bccd4 | urllib3 | 2.6.3 | 1 |
| kocolosk/ | 6effb982154e | urllib3 | 2.6.3 | 1 |
| kong/ | a6ac46531193 | python-pip | no fix listed | 1 |
| kserve/ | 63ea05e73842 | urllib3 | 2.6.3 | 1 |
| kserve/ | 73486345a602 | urllib3 | 2.6.3 | 1 |
| kubeaws/ | c9cd2ba4373a | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | afb52057c997 | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | d762690e21c1 | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | 0876fef1973b | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | 77f07f52a84a | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | 7299fa94db15 | urllib3 | 2.6.3 | 1 |
| kubeflownotebookswg/ | f63c3e550af3 | urllib3 | 2.6.3 | 1 |
| kubegems/ | 10abb76892b8 | urllib3 | 2.6.3 | 1 |
| kubesphere/ | 378f49ec9c44 | urllib3 | 2.6.3 | 1 |
| kubitodev/ | aa24869319bf | urllib3 | 2.6.3 | 1 |
| kusionstack/ | b707d3bf0abd | urllib3 | 2.6.3 | 1 |
| kusionstack/ | 126c8f0b0976 | python-pip | no fix listed | 1 |
| kyso/ | 4aa9d38ee81d | urllib3 | 2.6.3 | 1 |
| langgenius/ | 066035f93856 | urllib3 | 2.6.3 | 1 |
| langgenius/ | fca918260dd6 | urllib3 | 2.6.3 | 1 |
| langgenius/ | 3c694329357b | python-pip | no fix listed | 1 |
| langgenius/ | 8269050f192e | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| langgenius/ | da995c129e2f | python-pip | no fix listed | 1 |
| langgenius/ | 4e65e8a351a2 | urllib3 | 2.6.3 | 1 |