zot: Bearer authentication maps DELETE to push scope, allowing unauthorized deletion

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-61833
StatePUBLISHED
AssignerGitHub_M
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-09-18 17:16:59 UTC
Updated2026-09-30 17:32:07 UTC
Descriptionzot is a container image and artifact registry based on the Open Container Initiative Distribution Specification. Prior to 2.1.18, the bearer authentication handler in pkg/api/authn.go maps every HTTP method other than GET and HEAD to the push action, so DELETE requests are not checked for the distinct delete permission. Bearer-authenticated requests also bypass the fine-grained DistSpecAuthzHandler path in pkg/api/authz.go, while DeleteManifest and DeleteBlob perform no independent delete-permission check. A remote attacker with a bearer token limited to pull and push actions can therefore delete manifests and blobs within the token's repository scope, making images unavailable and allowing repository history to be altered despite the token lacking delete authorization. This issue is fixed in version 2.1.18.

Risk And Classification

Primary CVSS: v3.1 8.1 HIGH from [email protected]

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

EPSS: 0.005070000 probability, percentile 0.410140000 (date 2026-10-01)

Problem Types: CWE-285 | CWE-285 CWE-285: Improper Authorization

VersionSourceTypeScoreSeverityVector
3.1[email protected]Secondary8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H
3.1CNADECLARED8.1HIGHCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
High
Availability
High

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Project-zot Zot affected < 2.1.18 Not specified

References

ReferenceSourceLinkTags
github.com/project-zot/zot/releases/tag/v2.1.18 [email protected] github.com
github.com/project-zot/zot/security/advisories/GHSA-qg67-7m6v-qg25 134c704f-9b21-4f2e-91b3-4a467353bcc0 github.com
github.com/project-zot/zot/commit/7bb211bcd4352b90f3e99752607fbd1f050bf7ca [email protected] github.com
github.com/project-zot/zot/pull/4161 [email protected] github.com
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