What’s Vulnerable › Vulnerabilities

CVE-2026-23991: go-tuf affected by client DoS via malformed server response

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.6% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-01-22 · updated 2026-06-17
• Weakness: CWE-617

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.

Affected products

• theupdateframework go-tuf: from 2.0.0 before 2.3.1 — fixed in 2.3.1

How to fix

Upgrade to a fixed version: theupdateframework go-tuf 2.3.1. Check the vendor advisory for mitigations.

References

• https://github.com/theupdateframework/go-tuf/commit/73345ab6b0eb7e59d525dac17a428f043074cef6
• https://github.com/theupdateframework/go-tuf/releases/tag/v2.3.1
• https://github.com/theupdateframework/go-tuf/security/advisories/GHSA-846p-jg2w-w324

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