Description
Yamcs is a mission control framework. Prior to 5.12.7, the authentication endpoint POST /auth/token in yamcs-core, handled by yamcs-core/src/main/java/org/yamcs/http/auth/AuthHandler.java, lacked any rate limiting, account lockout, or failed-attempt throttling, so an unauthenticated remote attacker could perform unlimited password-guessing attempts against any user account, significantly increasing the risk of successful brute-force attacks. This issue is fixed in versions 5.12.7 and 5.13.0.
Affected products
spaceapplications: yamcs
References6
- github.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4 ExploitVendor Advisory
- github.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4 ExploitVendor Advisory
- github.com/yamcs/yamcs/commit/309218c651680f79df11a8d0f8628f703… Patch
- github.com/yamcs/yamcs/commit/64392df531fbcbc65f19ee5724c4c23d2… Patch
- github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 Release Notes
- github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 Release Notes
Metrics
- CVSS 3.1
-
9.8
CRITICAL
Score source: NVD
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H - EPSS — exploit probability
- 2% percentile: 82 · as of 15 November 2026
- CWE
- CWE-307
Could this be exploited in your environment?
A patch closes the known hole. A penetration test shows what an attacker can still reach — with proof.