Vulnerability · Published Jul 16, 2026 · Assigned by GitHub_M
CVE-2026-44596Yamcs: No Rate Limiting on Authentication Endpoint
Medium 6.5
In plain English
A medium-severity security flaw in yamcs from yamcs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 2.1% (higher than 81% of all known vulnerabilities). Ready-made attack tooling exists: public proof-of-concept code. Fixed versions are available - upgrade the affected package.
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Maven | org.yamcs:yamcs-core | 5.12.7 | GHSA-w5r6-mcgq-7pq4 |
Affected products (as reported)
Weakness: CWE-307 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
References
- https://github.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4 x_refsource_CONFIRM
- https://github.com/yamcs/yamcs/commit/309218c651680f79df11a8d0f8628f7033f98a83 x_refsource_MISC
- https://github.com/yamcs/yamcs/commit/64392df531fbcbc65f19ee5724c4c23d289f49fc x_refsource_MISC
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7 x_refsource_MISC
- https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0 x_refsource_MISC