CVE-2025-61984
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code...
- Published
- Oct 6, 2025
- Updated
- Sep 8, 2026
- Assigning CNA
- mitre
- Evidence observed
- Aug 25, 2026
Primary CVSS
nvd · CVSS 3.1
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:L/I:L/A:NLow · next 30 days
- Percentile
- 21.3%
- Model date
- Sep 21, 2026
EPSS is a statistical estimate, not a certainty or a measure of impact. Combine it with CVSS, KEV status, exposure and your environment.
Summary
ssh in OpenSSH before 10.1 allows control characters in usernames that originate from certain possibly untrusted sources, potentially leading to code execution when a ProxyCommand is used. The untrusted sources are the command line and %-sequence expansion of a configuration file. (A configuration file that provides a complete literal username is not categorized as an untrusted source.)
Sources
2Proof-of-concept demonstrating a newline injection vulnerability in OpenSSH ProxyCommand (CVE-2025-61984), allowing command injection via crafted SSH configuration.
Proof-of-concept exploit for CVE-2025-61984, demonstrating the vulnerability and providing a working exploit for security testing and validation.
Responsible use
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