CVE-2026-31801Public exploitNetwork attack vector

Tag overwrite via latest authorization exemption

Published Mar 10, 2026 · Updated Mar 10, 2026

Incorrect authorization in zot 1.3.0 through 2.1.14 allows remote authenticated users to overwrite an existing latest tag. DistSpecAuthzHandler in pkg/api/authz.go treats PUT /v2/{name}/manifests/latest as create even when latest exists, bypassing the update-permission check. Exploitation requires create permission without update permission and an existing latest tag, enabling unauthorized replacement of a trusted manifest.

CVSS severity7.7
High
EPSS probability0.21%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Incorrect authorization in zot 1.3.0 through 2.1.14 allows remote authenticated users to overwrite an existing latest tag. DistSpecAuthzHandler in pkg/api/authz.go treats PUT /v2/{name}/manifests/latest as create even when latest exists, bypassing the update-permission check. Exploitation requires create permission without update permission and an existing latest tag, enabling unauthorized replacement of a trusted manifest.

The record

CVE
CVE-2026-31801
Published
Mar 10, 2026
Updated
Mar 10, 2026
Vendor
The zot Project
Product
zot
Classifications
CWE-863, T1195.002
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Mar 10, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 10, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=>= 1.3.0, < v2.1.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The zot Project · zotversion=>= 1.3.0, < v2.1.15

Published CVSS scores

7.7GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1195.002Compromise Software Supply Chain

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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