Auth bypass in Project-Zot Zot
CVE-2026-31801
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.
Vulnerability class: Broken Access Control
EPSS: 0.002 (11.7th percentile) — read the EPSS interpretation.
CVSS v3 metric
CVSS v3 base score 7.7 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N.
Affected products
- Project-zot Zot — versions >= 1.3.0, < v2.1.15
- Zotregistry Zot
Weakness classification (CWE)
References
- security-advisories@github.com (x_refsource_CONFIRM, Exploit, Mitigation, Vendor Advisory)
Frequently asked questions
- What is CVE-2026-31801?
- CVE-2026-31801 is a high-severity vulnerability in Project-Zot Zot, classified under Incorrect Authorization. CVSS score: 7.7/10. Published 2026-03-10.
- How severe is CVE-2026-31801?
- High severity. CVSS v3 base score is 7.7 out of 10.