CVE-2026-44596mediumCWE-307

CVE-2026-44596: medium-severity vulnerability in yamcs

Yamcs: No Rate Limiting on Authentication Endpoint

Published · Updated

33Vexday Risk Score

No sign of exploitation. It has a public proof of concept.

ssvc Attendcvss 6.5epss 2.1%
from disclosure to weapon0 days
Published on NVDJul 16
1st PoCMay 29
exploitation probability
2.1%top 19% of all CVEs
observed exploitation
nono source reports it
2 public exploit(s)
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.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
Affected products
yamcs · yamcs
public PoCs found — 2
exploitdbwww.exploit-db.com/exploits/52605unverifiedgithubgithub.com/ex-cal1bur/CVE-2026-44596★ 0
⚠ Public resources, to assess the exposure of systems you control or are authorized to test. Test only with authorization.
Related CVEs — yamcs

In the same product, most dangerous first.

CVE-2026-55552HIGHYamcs: Unauthenticated Directory TraversalEPSS 1.7%CVE-2026-55549MEDIUMYamcs: Reflected XSS in the URL of the Authorize EndpointEPSS 1.3%CVE-2026-46621CRITICALYamcs: Authenticated Remote Code Execution (RCE) via Jython Algorithm Code InjectionEPSS 1.1%CVE-2026-44632CRITICALYamcs: Server-Side Code Injection (RCE) via Janino Expression Engine in `JavaExprAlgorithmExecutionFactory`EPSS 1.1%CVE-2026-44595MEDIUMYamcs: Unauthorized user enumeration via IAM API endpointsEPSS 1.1%CVE-2026-42568MEDIUMYamcs Vulnerable to LDAP Injection in LdapAuthModuleEPSS 1.0%
References
https://github.com/yamcs/yamcs/commit/309218c651680f79df11a8d0f8628f7033f98a83https://github.com/yamcs/yamcs/commit/64392df531fbcbc65f19ee5724c4c23d289f49fchttps://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.7https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.0https://github.com/yamcs/yamcs/security/advisories/GHSA-w5r6-mcgq-7pq4