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 |
|---|---|---|---|---|
| gurolakman/ | 8739565c3ea2 | urllib3 | 2.6.3 | 1 |
| halkeye/ | 77b05e95fdb5 | urllib3 | 2.6.3 | 1 |
| hamzaarshad10/ | 2c1c3b86a8e7 | urllib3 | 2.6.3 | 1 |
| hamzaarshad10/ | 154f38e8668e | urllib3 | 2.6.3 | 1 |
| hansehe/ | bc8e45262bc4 | urllib3 | 2.6.3 | 1 |
| haveagitgat/ | 1256348872ce | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| haveagitgat/ | 1e3f9328327d | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| haveagitgat/ | 3ff0913202dd | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| hayk96/ | 86377705e9e3 | urllib3 | 2.6.3 | 1 |
| hcguersoy/ | 63b76fdcfbe1 | urllib3 | 2.6.3 | 1 |
| healthchecks/ | e82bb0836e30 | urllib3 | 2.6.3 | 1 |
| hhyo/ | 1aa41843419e | urllib3 | 2.6.3 | 1 |
| hiboxsystems/ | 7235809b43b3 | urllib3 | 2.6.3 | 1 |
| hiboxsystems/ | a96c10b61a59 | urllib3 | 2.6.3 | 1 |
| hiboxsystems/ | b59f01bc0418 | urllib3 | 2.6.3 | 1 |
| hiboxsystems/ | dcffb926e563 | urllib3 | 2.6.3 | 1 |
| hjacobs/ | 5d328c003efe | urllib3 | 2.6.3 | 1 |
| hjacobs/ | fbb303ed463c | urllib3 | 2.6.3 | 1 |
| hjacobs/ | a4fae38f93d7 | urllib3 | 2.6.3 | 1 |
| hjacobs/ | 45f93491c434 | urllib3 | 2.6.3 | 1 |
| hjacobs/ | c173cd02f5af | urllib3 | 2.6.3 | 1 |
| hjacobs/ | 431f1bf013d0 | urllib3 | 2.6.3 | 1 |
| hjacobs/ | b44a9cf81a2f | urllib3 | 2.6.3 | 1 |
| hkotel/ | a7e6b6abe087 | urllib3 | 2.6.3 | 1 |
| hmdmph/ | 79e4a170f3dc | urllib3 | 2.6.3 | 1 |
| hmdmph/ | 7f1381fe0f3b | urllib3 | 2.6.3 | 1 |
| homeassistant/ | 021e2afc6e57 | urllib3 | 2.6.3 | 1 |
| homeassistant/ | 8d000332b09b | urllib3 | 2.6.3 | 1 |
| i4trust/ | 9f3719176893 | urllib3 | 2.6.3 | 1 |
| ibmcom/ | d28bf361327a | urllib3 | 2.6.3 | 1 |
| ihatemoney/ | 457fda1feb32 | urllib3 | 2.6.3 | 1 |
| ilum/ | ce5dcdeb22ba | urllib3 | 2.6.3 | 1 |
| improwised/ | 97280b55cbd4 | urllib3 | 2.6.3 | 1 |
| intel/ | aa8f5483a2ef | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| iosifache/ | 85df3f04b5da | urllib3 | 2.6.3 | 1 |
| istio/ | 6668bcf42ef0 | urllib3 | 2.6.3 | 1 |
| istio/ | 328b237e4fb1 | urllib3 | 2.6.3 | 1 |
| istio/ | 0a7f02b2c7c9 | urllib3 | 2.6.3 | 1 |
| jaedb/ | 048cfbf58d57 | python-urllib3 urllib3 | 1.26.12-1+deb12u3 2.6.3 | 1 |
| jamoos/ | 163e2e8a6e87 | urllib3 | 2.6.3 | 1 |
| jertel/ | 3cbf63f9b7dc | urllib3 | 2.6.3 | 1 |
| jertel/ | 4dcc0ef93efc | urllib3 | 2.6.3 | 1 |
| jmferrer/ | 030f68ec6998 | urllib3 | 2.6.3 | 1 |
| jonasal/ | ec1eee99a18d | urllib3 | 2.6.3 | 1 |
| jordan/ | f75025fe8ea8 | urllib3 | 2.6.3 | 1 |
| josh5/ | 4d49c4816260 | python-pip urllib3 | no fix listed 2.6.3 | 1 |
| juicedata/ | 95008ba63318 | urllib3 | 2.6.3 | 1 |
| juicedata/ | d915e899e322 | urllib3 python-urllib3 | 2.6.3 1.26.5-1~exp1+deb11u3 | 1 |
| julb/ | 837c4038a0dd | urllib3 | 2.6.3 | 1 |
| julb/ | d7d8836366ad | urllib3 | 2.6.3 | 1 |