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.
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-85jx-fm8m-x8c6 zot’s create-only policy allows overwrite attempts of existing latest tag (update permission not required)
Fixes

Solution

No solution given by the vendor.


Workaround

No workaround given by the vendor.

History

Wed, 18 Mar 2026 19:45:00 +0000

Type Values Removed Values Added
First Time appeared Zotregistry
Zotregistry zot
CPEs cpe:2.3:a:zotregistry:zot:*:*:*:*:*:*:*:*
Vendors & Products Zotregistry
Zotregistry zot

Wed, 11 Mar 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'poc', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Wed, 11 Mar 2026 12:00:00 +0000

Type Values Removed Values Added
First Time appeared Project-zot
Project-zot zot
Vendors & Products Project-zot
Project-zot zot

Tue, 10 Mar 2026 21:15:00 +0000

Type Values Removed Values Added
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.
Title zot create-only policy allows overwrite attempts of existing latest tag (update permission not required)
Weaknesses CWE-863
References
Metrics cvssV3_1

{'score': 7.7, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-11T16:00:33.441Z

Reserved: 2026-03-09T16:33:42.913Z

Link: CVE-2026-31801

cve-icon Vulnrichment

Updated: 2026-03-11T15:37:35.589Z

cve-icon NVD

Status : Analyzed

Published: 2026-03-10T21:16:49.850

Modified: 2026-03-18T19:30:20.843

Link: CVE-2026-31801

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-03-11T11:42:10Z

Weaknesses