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TI-2026-24356 Aliases CVE-2026-31801GHSA-85jx-fm8m-x8c6

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

Priority HIGH 67CWE-863Published · Updated

Key facts

Attack vector
Network
Privileges required
Low
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
None · High · None
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA and GitHub. Impact type from CWE-863.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00242 15th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed zot (project-zot): v2.1.15zotregistry.dev/zot/v2 (Go): 2.1.15

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
project-zotzot1.3.0 to before v2.1.15v2.1.15Patch availableCNA
—zotregistry.dev/zot/v2 (Go)before 2.1.152.1.15Patch availableGHSA-85jx-fm8m-x8c6
—zotregistry.dev/zot (Go)1.3.0-20210831063041-c8779d9e87d9 – 1.4.4-20251014054906-73eef25681af—No fix listedGHSA-85jx-fm8m-x8c6
  • zot Vendorproject-zot Affected 1.3.0 to before v2.1.15 Fixed in v2.1.15 Patch available CNA
  • zotregistry.dev/zot/v2 (Go) Vendor— Affected before 2.1.15 Fixed in 2.1.15 Patch available GHSA-85jx-fm8m-x8c6
  • zotregistry.dev/zot (Go) Vendor— Affected 1.3.0-20210831063041-c8779d9e87d9 – 1.4.4-20251014054906-73eef25681af Fixed in — No fix listed GHSA-85jx-fm8m-x8c6

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:zotregistry:zot:*:*:*:*:*:*:*:*1.3.0 to before 2.1.15Vulnerableproject-zot
  • cpe:2.3:a:zotregistry:zot:*:*:*:*:*:*:*:* Versions 1.3.0 to before 2.1.15 Vulnerable ·project-zot

Remediation

  • Fix · CNA zot (project-zot) Fixed in v2.1.15
  • Fix · GHSA-85jx-fm8m-x8c6 zotregistry.dev/zot/v2 (Go) Fixed in 2.1.15 Advisory →

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-31801
  2. 2026-10-03 Alias added: GHSA-85jx-fm8m-x8c6

References

Exploit 1

Advisory 1

Other 2

  • TI-2025-16993 IdP group membership revocation ignored in zot CVSS 3.1HIGH 7.3
  • TI-2024-26792 Cache driver GetBlob() allows read access to any blob without access control check CVSS 3.1MEDIUM 4.3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences