CVE-2021-41087: In-Toto In-Toto-Golang

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

in-toto-golang is a go implementation of the in-toto framework to protect software supply chain integrity. In affected versions authenticated attackers posing as functionaries (i.e., within a trusted set of users for a layout) are able to create attestations that may bypass DISALLOW rules in the same layout. An attacker with access to trusted private keys, may issue an attestation that contains a disallowed artifact by including path traversal semantics (e.g., foo vs dir/../foo). Exploiting this vulnerability is dependent on the specific policy applied. The problem has been fixed in version 0.3.0.

Affected products

• In-Toto In-Toto-Golang: before 0.3.0 (fixed in 0.3.0)

Published 2021-09-21. Last modified 2026-06-17.