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CVE-2026-31801

Zotregistry Zot broken access control

7.7 HIGHPublic exploitEPSS 0.32%
  1. Published10 Mar 2026

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.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeChanged
ConfidentialityNone
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

Affected products

Zotregistry Zot≥ 1.3.0 < 2.1.15

Remediation

Fixed in
Zotregistry Zot≥ 2.1.15

References

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Frequently asked

Is CVE-2026-31801 being actively exploited?

CVE-2026-31801 is not in the CISA KEV catalog. A public exploit reference exists, so treat it as exploitable. Its EPSS exploit probability is 0.32%.

How severe is CVE-2026-31801?

CVE-2026-31801 has a CVSS 3.1 base score of 7.7, rated high. EPSS estimates a 0.32% probability of exploitation.

Which products are affected by CVE-2026-31801?

Affected products include Zotregistry Zot.

How do I fix CVE-2026-31801?

Upgrade affected software to a fixed version, for example Zotregistry Zot 2.1.15 or later, then confirm no affected versions remain in your inventory.

How Secuno handles this

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Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.