Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
gitsign versions from 0.4.0 before 0.15.0 panic when verifying a CMS/PKCS7 signature with an empty certificate set, then exit with code 0. An attacker who supplies such a signature can make scripts or CI that check only the exit code treat a failed verification as successful, provided a victim runs gitsign --verify. Upgrade to gitsign 0.15.0.
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 |
|---|---|---|---|---|
| 5.4 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:L | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.0013, the 2nd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:14 UTC First seen by agentprime
- 31 Oct 2026, 14:14 UTC Confirmed by OSV