Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
The in-toto-golang Go package, versions before 0.3.0, has improper path matching. An authenticated attacker acting as a functionary, who holds trusted private keys, can create attestations that include a disallowed artifact by using path traversal sequences, bypassing DISALLOW rules in the layout. Upgrade to version 0.3.0 or later; the source lists no workaround beyond noting that exploitation depends on the policy applied.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 5.6 | Medium | 3.1 | CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:N/I:H/A:N | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0043, the 37th percentile, on 11 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:05 UTC First seen by agentprime
- 31 Oct 2026, 15:05 UTC Confirmed by OSV