CVE-2026-55545: Yamcs's WebSocket subscription handlers omit the privilege checks their REST siblings enforce
Several WebSocket subscription handlers do not perform the privilege check that their REST counterparts enforce, so a principal subscribing over WebSocket receives data the REST API would have scoped or denied.
References
- github.com/advisories/GHSA-fwww-cp23-7f5g
- github.com/yamcs/yamcs/commit/0691731846c5a0aca81b88fabbd2cd51d56fe076
- github.com/yamcs/yamcs/commit/12864af555e6ca4941b01c1f1217859cc0492ce0
- github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8
- github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2
- github.com/yamcs/yamcs/security/advisories/GHSA-fwww-cp23-7f5g
- nvd.nist.gov/vuln/detail/CVE-2026-55545
Code Behaviors & Features
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