CVE-2026-23992: go-tuf improperly validates the configured threshold for delegations

Severity: high (CVSS 7.5 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.2% 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-347

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, a compromised or misconfigured TUF repository can have the configured value of signature thresholds set to 0, which effectively disables signature verification. This can lead to unauthorized modification to TUF metadata files is possible at rest, or during transit as no integrity checks are made. Version 2.3.1 fixes the issue. As a workaround, always make sure that the TUF metadata roles are configured with a threshold of at least 1.

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

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