How severe is CVE-2026-31801?

CVE-2026-31801 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.

Is CVE-2026-31801 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-31801?

CVE-2026-31801 affects Zotregistry Zot. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-31801?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

Does CVE-2026-31801 have an EU (EUVD) identifier?

Yes. CVE-2026-31801 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10890.

When was CVE-2026-31801 published?

CVE-2026-31801 was published on 2026-03-10 and last updated on 2026-06-17.

CVE-2026-31801

CVE-2026-31801 is a high-severity vulnerability in Zotregistry Zot with a CVSS 3.x base score of 7.7. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-863.

Key facts

Severity: High (CVSS 3.x base score 7.7)
EPSS exploit prediction: 0% (12th percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-10890
Weakness: CWE-863
Affected product: Zotregistry Zot
Published: 2026-03-10
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-31801?: 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.
How severe is CVE-2026-31801?: CVE-2026-31801 has a CVSS 3.x base score of 7.7, rated high severity. It is exploitable over network with low attack complexity, requires low privileges and no user interaction. Impact on confidentiality is none, integrity high, and availability none.
Is CVE-2026-31801 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (12th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-31801?: CVE-2026-31801 affects Zotregistry Zot. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-31801?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
Does CVE-2026-31801 have an EU (EUVD) identifier?: Yes. CVE-2026-31801 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-10890.
When was CVE-2026-31801 published?: CVE-2026-31801 was published on 2026-03-10 and last updated on 2026-06-17.

References

https://github.com/project-zot/zot/security/advisories/GHSA-85jx-fm8m-x8c6

Affected products (1)

cpe:2.3:a:zotregistry:zot:*:*:*:*:*:*:*:*

More vulnerabilities in Zotregistry Zot

CVE-2025-23208 — High (CVSS 7.3): zot is a production-ready vendor-neutral OCI image registry. The group data stored for users in the boltdb database…
CVE-2024-39897 — Medium (CVSS 4.3): zot is an OCI image registry. Prior to 2.1.0, the cache driver `GetBlob()` allows read access to any blob without…

All CVEs affecting Zotregistry Zot →

Other CWE-863 (Incorrect Authorization) vulnerabilities

CVE-2026-48286 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9396 and earlier are affected by an Incorrect Authorization…
CVE-2026-48303 — Critical (CVSS 10.0): Adobe Campaign Classic (ACC) versions 7.4.3 build 9394 and earlier are affected by an Incorrect Authorization…
CVE-2026-44330 — Critical (CVSS 10.0): free5GC is an open-source implementation of the 5G core network. Prior to 4.2.2, free5GC's NEF mounts the…
CVE-2026-46595 — Critical (CVSS 10.0): Previously, CVE-2024-45337 fixed an authorization bypass for misused ssh server configurations; if any other type of…
CVE-2026-33105 — Critical (CVSS 10.0): Improper authorization in Microsoft Azure Kubernetes Service allows an unauthorized attacker to elevate privileges over…
CVE-2026-32213 — Critical (CVSS 10.0): Improper authorization in Azure AI Foundry allows an unauthorized attacker to elevate privileges over a network.

Browse all CWE-863 (Incorrect Authorization) vulnerabilities →