CVE-2026-21860
MediumAdvisory
Published 8 Jan 2026In the index since 5 Sept 2026
- Severity
- Medium
- worst across findings
- CVSS
- 5.3
- base score, highest
- EPSS
- 0.005
- 40th percentile
- CISA KEV
- Not listed
- no confirmed exploitation
- Charts affected
- 307
- of 17,781 indexed, latest versions
- Container images
- 303
- deployed by those charts
- Fix available
- 1 of 1
- affected package
Werkzeug safe_join() allows Windows special device names with compound extensions
Carried by container images the latest versions of 307 of 17,781 indexed charts deploy, on 303 images.
| Affected package | Affected versions | Fixed in | Images |
|---|---|---|---|
| werkzeugpypi | 0.9.1, 0.11.15, 0.12.2, 0.13+33 more | 3.1.5 | 303 |
- OSV records
- GHSA-87hc-h4r5-73f7
- Also known as
- PYSEC-2026-2044
Charts affected
307 by stars
| Chart | Latest | Affected images | Radar Score |
|---|---|---|---|
| ambassadorwenerme | 6.9.5 | 1 of 2See more | 4,086 |
| emissary-ingresswenerme | 8.12.2 | 1 of 2See more | 10,843 |
| ceph-csi-cephfswikimedia | 0.1.8 | 1 of 5See more | 10,285 |
| ceph-csi-rbdwikimedia | 0.1.13 | 1 of 6See more | 11,784 |
| powerdnsadminwitcom-gmbh | 0.3.4 | 1 of 1See more | 2,643 |
| xkopsxkops | 0.1.0 | 1 of 5See more | 13,677 |
| zerossl-cert-managerzerossl-cert-manager | 0.1.0 | 1 of 2See more | 570 |
Container images carrying it
303 by charts deploying them
A fixed version is listed for 1 of the 1 affected package.
| Container image | Digest | Package | Fixed in | Used by |
|---|---|---|---|---|
| aristidetm/ | 469dbc951224 | werkzeug | 3.1.5 | 1 |
| arthurjguerra18/ | f540af20b307 | werkzeug | 3.1.5 | 1 |
| assistiot/ | 0aacefac9677 | werkzeug | 3.1.5 | 1 |
| assistiot/ | 0518b63a2e69 | werkzeug | 3.1.5 | 1 |
| assistiot/ | 792715dd3084 | werkzeug | 3.1.5 | 1 |
| assistiot/ | 44a37b00d4f8 | werkzeug | 3.1.5 | 1 |
| assistiot/ | a942dc14030a | werkzeug | 3.1.5 | 1 |
| assistiot/ | 38b003e55ff3 | werkzeug | 3.1.5 | 1 |
| assistiot/ | e32b87786142 | werkzeug | 3.1.5 | 1 |
| assistiot/ | e5ae539ce2cb | werkzeug | 3.1.5 | 1 |
| avinash263/ | aa2b8727f1a6 | werkzeug | 3.1.5 | 1 |
| azhar008/ | a1e827b0adea | werkzeug | 3.1.5 | 1 |
| badsmoke/ | c54c004f24cc | werkzeug | 3.1.5 | 1 |
| behnambm/ | bd3ad88afff9 | werkzeug | 3.1.5 | 1 |
| benbusby/ | f77f7e6e4ad2 | werkzeug | 3.1.5 | 1 |
| blakeblackshear/ | ae269270ad9e | werkzeug | 3.1.5 | 1 |
| bmeares/ | 8e9c5bacaa82 | werkzeug | 3.1.5 | 1 |
| bootc/ | f1383295e7be | werkzeug | 3.1.5 | 1 |
| buntha/ | 154542cc3083 | werkzeug | 3.1.5 | 1 |
| camptocamp/ | 35c91d5fda04 | werkzeug | 3.1.5 | 1 |
| cbanuka/ | c742770d4247 | werkzeug | 3.1.5 | 1 |
| ceph/ | 90f30824a96e | werkzeug | 3.1.5 | 1 |
| chandanteekinavar/ | c49ff7c141c0 | werkzeug | 3.1.5 | 1 |
| cheyang/ | 46cc34755493 | werkzeug | 3.1.5 | 1 |
| chorss/ | 5c549cacb8ab | werkzeug | 3.1.5 | 1 |
| citizenstig/ | b81c818ccb86 | werkzeug | 3.1.5 | 1 |
| ciuse99/ | d72768245ef5 | werkzeug | 3.1.5 | 1 |
| ckan/ | 84d11924549f | werkzeug | 3.1.5 | 1 |
| cleveritcz/ | c75c1636e0b7 | werkzeug | 3.1.5 | 1 |
| clsen2024/ | 1156cd87c8fb | werkzeug | 3.1.5 | 1 |
| craigwillis/ | ae317d7e4724 | werkzeug | 3.1.5 | 1 |
| dalibo/ | 2a0b749c2f7f | werkzeug | 3.1.5 | 1 |
| danuk/ | 026560388070 | werkzeug | 3.1.5 | 1 |
| datawire/ | 07f8fe4f4f8e | werkzeug | 3.1.5 | 1 |
| datawire/ | 2beb65062c8b | werkzeug | 3.1.5 | 1 |
| datawire/ | 95ec30b3c732 | werkzeug | 3.1.5 | 1 |
| datawire/ | 1f67a1292d2a | werkzeug | 3.1.5 | 1 |
| datawire/ | 9716efbdd24b | werkzeug | 3.1.5 | 1 |
| deepflowce/ | a1888d35e787 | werkzeug | 3.1.5 | 1 |
| devopsgoofy/ | ad865312099f | werkzeug | 3.1.5 | 1 |
| devopstales/ | 8bb837da5aec | werkzeug | 3.1.5 | 1 |
| devopstales/ | 42c40a0e9f1b | werkzeug | 3.1.5 | 1 |
| djjudas21/ | ba22be670c37 | werkzeug | 3.1.5 | 1 |
| djjudas21/ | 73aab45ef10d | werkzeug | 3.1.5 | 1 |
| djjudas21/ | 954935971d42 | werkzeug | 3.1.5 | 1 |
| dpage/ | 18cd5711fc9a | werkzeug | 3.1.5 | 1 |
| dpage/ | 37946e4f3e7b | werkzeug | 3.1.5 | 1 |
| dpage/ | 50700ac17936 | werkzeug | 3.1.5 | 1 |
| dpage/ | 52cb72a9e3da | werkzeug | 3.1.5 | 1 |
| dpage/ | 561c1f8f99f2 | werkzeug | 3.1.5 | 1 |