What’s Vulnerable › Vulnerabilities

CVE-2021-41087: Improperly Implemented path matching for in-toto-golang

• Severity: medium (CVSS 6.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2021-09-21 · updated 2026-06-17
• Weakness: CWE-345

Description

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-golang: before 0.3.0 — fixed in 0.3.0

How to fix

Upgrade to a fixed version: in-toto-golang 0.3.0. Check the vendor advisory for mitigations.

References

• https://github.com/in-toto/in-toto-golang/commit/f2c57d1e0f15e3ffbeac531829c696b72ecc4290
• https://github.com/in-toto/in-toto-golang/security/advisories/GHSA-vrxp-mg9f-hwf3
• https://github.com/in-toto/in-toto-golang/commit/f2c57d1e0f15e3ffbeac531829c696b72ecc4290
• https://github.com/in-toto/in-toto-golang/security/advisories/GHSA-vrxp-mg9f-hwf3

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