CVE-2026-31801

zot create-only policy allows overwrite attempts of existing latest tag (update permission not required)

zot is ancontainer image/artifact registry based on the Open Container Initiative Distribution Specification. From 1.3.0 to 2.1.14, zot’s dist-spec authorization middleware infers the required action for PUT /v2/{name}/manifests/{reference} as create by default, and only switches to update when the tag already exists and reference != "latest". As a result, when latest already exists, a user who is allowed to create (but not allowed to update) can still pass the authorization check for an overwrite attempt of latest. This vulnerability is fixed in 2.1.15.

Affected

project-zot · zot

CVSS v3.1 GITHUB

7.7 HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

EPSS

0.32% chance of exploitation in the next 30 days, 24th percentile

Published

2026-03-10

Updated

2026-03-11

Proof-of-concept exploits (1)

• advisories/GHSA-85jx-fm8m-x8c6

Security advisories

• project-zot/zot/security/advisories/GHSA-85jx-fm8m-x8c6

References

• CVE Record
• NVD entry