What’s Vulnerable › Vulnerabilities
CVE-2026-31801: zot create-only policy allows overwrite attempts of existing latest tag (update permission not required)
- Severity: high (CVSS 7.7 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.2% probability of exploitation in the next 30 days
- Public exploit or detection template: yes
- Published: 2026-03-10 · updated 2026-06-17
- Weakness: CWE-863
Description
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 products
- project-zot zot: from 1.3.0 before 2.1.15 — fixed in 2.1.15
How to fix
Upgrade to a fixed version: project-zot zot 2.1.15. Check the vendor advisory for mitigations.
References
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