go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key. Version 2.3.1 fixes the issue. No known workarounds are available.

Metrics

No CVSS v4.0

Attack Vector Network

Attack Complexity High

Privileges Required None

Scope Unchanged

Confidentiality Impact None

Integrity Impact None

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00015.

Exploitation none

Automatable no

Technical Impact partial

Affected Vendors & Products

Vendors Products
Theupdateframework Subscribe
Go-tuf Subscribe

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Vendors Products
Theupdateframework Subscribe
Go-tuf Subscribe
Advisories
Source ID Title
Github GHSA Github GHSA GHSA-846p-jg2w-w324 go-tuf affected by client DoS via malformed server response
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/theupdateframework/go-tuf/commit/73345ab6b0eb7e59d525dac17a428f043074cef6 cve-icon cve-icon cve-icon
https://github.com/theupdateframework/go-tuf/releases/tag/v2.3.1 cve-icon cve-icon cve-icon
https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-846p-jg2w-w324 cve-icon cve-icon cve-icon
https://nvd.nist.gov/vuln/detail/CVE-2026-23991 cve-icon
https://www.cve.org/CVERecord?id=CVE-2026-23991 cve-icon
History

Tue, 27 Jan 2026 12:15:00 +0000

Type Values Removed Values Added
References
Metrics threat_severity

None

 threat_severity

Moderate

Fri, 23 Jan 2026 16:45:00 +0000

Type Values Removed Values Added
First Time appeared Theupdateframework
Theupdateframework go-tuf
Vendors & Products Theupdateframework
Theupdateframework go-tuf

Thu, 22 Jan 2026 16:15:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Thu, 22 Jan 2026 02:45:00 +0000

Type Values Removed Values Added
Description go-tuf is a Go implementation of The Update Framework (TUF). Starting in version 2.0.0 and prior to version 2.3.1, if the TUF repository (or any of its mirrors) returns invalid TUF metadata JSON (valid JSON but not well formed TUF metadata), the client will panic during parsing, causing a denial of service. The panic happens before any signature is validated. This means that a compromised repository/mirror/cache can DoS clients without having access to any signing key. Version 2.3.1 fixes the issue. No known workarounds are available.
Title go-tuf affected by client DoS via malformed server response
Weaknesses CWE-617
CWE-754
References
Metrics cvssV3_1

{'score': 5.9, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-01-22T15:35:31.770Z

Reserved: 2026-01-19T18:49:20.657Z

Link: CVE-2026-23991

cve-icon Vulnrichment

Updated: 2026-01-22T15:35:25.431Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-01-22T03:15:47.317

Modified: 2026-01-26T15:04:59.737

Link: CVE-2026-23991

cve-icon Redhat

Severity : Moderate

Publid Date: 2026-01-22T02:16:37Z

Links: CVE-2026-23991 - Bugzilla

cve-icon OpenCVE Enrichment

Updated: 2026-01-22T10:08:00Z

Weaknesses