by Kastro
Paper/Archive/CVE-2026-44596

CVE-2026-44596

yamcs yamcs — Yamcs: No Rate Limiting on Authentication Endpoint

EPSS 2%public exploitCVSS 9.8
critical.is priorityof 100
56
CVSS 9.8 (NVD)9.8 / 10 × 3029.4Not in CISA KEV+300.0EPSS percentile 81.3.813 × 2016.3Exploit: SSVC poc+1010.0SSVC exploitation: poc+100.0
Description · from the CVE record

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

ProductAffectedFixed inSource
yamcs< 5.12.7–CNA

Scores by source

NVD9.8CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
GitHub_M (CNA)6.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
CISA ADPSSVCExploitation: poc · Automatable: yes · Technical impact: partial

References

exploitgithub.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4refgithub.com/yamcs/yamcs/commit/309218c651680f79df11a8d0f8628f7033f98a83refgithub.com/yamcs/yamcs/commit/64392df531fbcbc65f19ee5724c4c23d289f49fcrefgithub.com/yamcs/yamcs/releases/tag/yamcs-5.12.7refgithub.com/yamcs/yamcs/releases/tag/yamcs-5.13.0