Vulnerability · Published Jan 8, 2026 · Assigned by curl
CVE-2025-15224libssh key passphrase bypass without agent set
Low 3.1
In plain English
A low-severity improper authentication in curl from curl. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)3.1Low
Exploit odds (30 days)0.5%top 58.4% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
When doing SSH-based transfers using either SCP or SFTP, and asked to do public key authentication, curl would wrongly still ask and authenticate using a locally running SSH agent.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Alpine:v3.24 | curl | 0 | ALPINE-CVE-2025-15224 |
| Debian:12 | curl | no fix listed | DEBIAN-CVE-2025-15224 |
| Debian:13 | curl | no fix listed | DEBIAN-CVE-2025-15224 |
| Debian:14 | curl | 8.18.0-1 | DEBIAN-CVE-2025-15224 |
| Ubuntu:22.04:LTS | curl | 7.81.0-1ubuntu1.22 | USN-8062-1 |
| Ubuntu:22.04:LTS | curl | 7.81.0-1ubuntu1.22 | UBUNTU-CVE-2025-15224 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu10.7 | USN-8062-1 |
| Ubuntu:24.04:LTS | curl | 8.5.0-2ubuntu10.7 | UBUNTU-CVE-2025-15224 |
| Ubuntu:25.10 | curl | 8.14.1-2ubuntu1.1 | USN-8062-1 |
Affected products (as reported)
Weakness: CWE-287 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N