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 |
|---|---|---|---|---|
| billimek/ | bf8158556035 | urllib3 | 2.6.3 | 1 |
| blacktop/ | fc5e68e2f5ab | urllib3 | 2.6.3 | 1 |
| bmeares/ | 8e9c5bacaa82 | urllib3 | 2.6.3 | 1 |
| bnjbvr/ | 37e216b182c8 | urllib3 | 2.6.3 | 1 |
| boky/ | aafc77238423 | urllib3 | 2.6.3 | 1 |
| bootc/ | f1383295e7be | urllib3 | 2.6.3 | 1 |
| browserless/ | c81ae5585b47 | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| buildkite/ | aec38cfaae0e | urllib3 | 2.6.3 | 1 |
| buntha/ | 154542cc3083 | urllib3 | 2.6.3 | 1 |
| camerahub/ | a5af37dd6e1b | urllib3 | 2.6.3 | 1 |
| camptocamp/ | acfafc308d88 | urllib3 | 2.6.3 | 1 |
| camptocamp/ | 35c91d5fda04 | urllib3 | 2.6.3 | 1 |
| camptocamp/ | bff736b15623 | urllib3 | 2.6.3 | 1 |
| camptocamp/ | 2924b43dbf40 | urllib3 | 2.6.3 | 1 |
| cdignam/ | 5a6a55b39cee | urllib3 | 2.6.3 | 1 |
| chetangautamm/ | e7f7049e1544 | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| chubaofs/ | 15ff74209ce7 | urllib3 | 2.6.3 | 1 |
| chubaofs/ | 205030e045f2 | urllib3 | 2.6.3 | 1 |
| ciuse99/ | d72768245ef5 | urllib3 | 2.6.3 | 1 |
| ckan/ | 84d11924549f | urllib3 | 2.6.3 | 1 |
| cleveritcz/ | c75c1636e0b7 | urllib3 | 2.6.3 | 1 |
| cloudve/ | af56e77ca587 | python-pip urllib3 | 9.0.1-2.3~ubuntu1.18.04.8+esm8 2.6.3 | 1 |
| cloudve/ | d79c1c5881c0 | urllib3 | 2.6.3 | 1 |
| clowder/ | 11f3d844e4c0 | urllib3 | 2.6.3 | 1 |
| clowder/ | 14155326c7b9 | urllib3 | 2.6.3 | 1 |
| clowder/ | bf146f1ca24f | urllib3 | 2.6.3 | 1 |
| codaprotocol/ | 37c68e67a401 | urllib3 | 2.6.3 | 1 |
| codaprotocol/ | 4ba4dd3a041f | urllib3 | 2.6.3 | 1 |
| codecov/ | 0475cb1c3136 | urllib3 | 2.6.3 | 1 |
| codecov/ | 837f546b479b | urllib3 | 2.6.3 | 1 |
| confluentinc/ | f2975d507a2a | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 8f1544df1f48 | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 3bf359d5e340 | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 83dbca3efd2a | urllib3 | 2.6.3 | 1 |
| confluentinc/ | adc392d28a1e | urllib3 | 2.6.3 | 1 |
| confluentinc/ | c0224a1adf7a | urllib3 | 2.6.3 | 1 |
| confluentinc/ | dc9b972db002 | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 4bc70a83ca6f | urllib3 | 2.6.3 | 1 |
| confluentinc/ | b0b7aa26254a | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 8ec46c27982f | urllib3 | 2.6.3 | 1 |
| confluentinc/ | ee403d5b9090 | urllib3 | 2.6.3 | 1 |
| confluentinc/ | b651d4b6185a | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 0bec03c1f3ce | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 5ca5f3269814 | urllib3 | 2.6.3 | 1 |
| confluentinc/ | 78c190f4472c | urllib3 | 2.6.3 | 1 |
| countly/ | e3c238248f99 | python-urllib3 urllib3 | 1.25.8-2ubuntu0.4+esm3 2.6.3 | 1 |
| cr0hn/ | 14482d0bc4a1 | urllib3 | 2.6.3 | 1 |
| craigwillis/ | ae317d7e4724 | urllib3 | 2.6.3 | 1 |
| crazymax/ | fb307f5b87bf | urllib3 | 2.6.3 | 1 |
| danialnabiyan1382/ | f96a7ebf1f42 | urllib3 | 2.6.3 | 1 |