{"id":"CVE-2026-55548","aliases":["GHSA-8xjq-pr36-ccgf"],"url":"https://o3.security/vulnerability/CVE-2026-55548","summary":"Yamcs: Insecure Direct Object Reference (IDOR) in PacketsApi allows unprivileged users to dump all telemetry packets","details":"Yamcs is a mission control framework. Prior to 5.12.8 and 5.13.2, the PacketsApi.exportPackets endpoint in yamcs-core/src/main/java/org/yamcs/http/api/PacketsApi.java failed to enforce object-level ReadPacket privileges when a request omitted specific packet names: with an empty name list the ctx.checkObjectPrivileges(ObjectPrivilegeType.ReadPacket, nameSet) call passed over an empty set, no WHERE pname IN filter was applied to the resulting SELECT * FROM tm query, and the onTuple handler streamed every retrieved packet without any per-row authorization check, so a low-privileged or zero-privilege authenticated user could dump the entire raw telemetry packet archive and bypass the role-based access control model. This issue is fixed in versions 5.12.8 and 5.13.2, which enforce per-packet ReadPacket checks in exportPackets.","published":"2026-07-16T16:09:35.505Z","modified":"2026-08-12T16:41:19.720088Z","cvss":{"score":4.3,"severity":"MEDIUM","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N"},"epss":{"score":0.0036,"percentile":0.28703,"asOf":"2026-08-24"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.yamcs:yamcs-core","fixedVersion":"5.13.2"},{"ecosystem":"Maven","name":"org.yamcs:yamcs-core","fixedVersion":"5.12.8"}],"fix":{"url":"https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438","label":"yamcs/yamcs@b566bec"},"references":[{"type":"WEB","url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.12.8"},{"type":"WEB","url":"https://github.com/yamcs/yamcs/releases/tag/yamcs-5.13.2"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55548.json"},{"type":"ADVISORY","url":"https://github.com/yamcs/yamcs/security/advisories/GHSA-8xjq-pr36-ccgf"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55548"},{"type":"FIX","url":"https://github.com/yamcs/yamcs/commit/b566beceba98cc35514b0e1519be126b8c5a0438"},{"type":"FIX","url":"https://github.com/yamcs/yamcs/commit/c743cc3acf5b5c53ff5181b94eacc21340f70dd9"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T16:41:19.720088Z"}}