Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Kopia versions before 0.23.0 are affected. If the server runs without a password, an unauthenticated network attacker can send a single HTTP request to the repository existence endpoint with a crafted SFTP storage configuration, which can execute arbitrary commands as the Kopia process user. Upgrade to Kopia 0.23.0 or later; the source's mitigation is to avoid starting the server without a password, especially when listening on a non-loopback interface.
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 |
|---|---|---|---|---|
| 9.8 | Critical | 3.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H | CNA (GitHub_M) |
- CISA KEV Not listed.
- EPSS 0.016, the 76th percentile, on 15 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 15:08 UTC First seen by agentprime
- 31 Oct 2026, 15:08 UTC Confirmed by OSV