{"id":"GHSA-vqv5-385r-2hf8","revision":"a2341130175d4ad59e9dddf184912764","records":[{"revision":"a2341130175d4ad59e9dddf184912764","observedAt":"2026-10-24T13:19:41.952+00:00","statement":{"source":"osv","id":"GHSA-vqv5-385r-2hf8","aliases":["CVE-2025-71426","GO-2025-3455"],"title":"Contrast's unauthenticated recovery allows Coordinator impersonation","description":"### Impact\n\nRecovering coordinators do not verify the seed provided by the recovering party. This allows an attacker to set up a coordinator with a manifest that passes validation, but with a secret seed controlled by the attacker. \n\nIf network traffic is redirected from the legitimate coordinator to the attacker's coordinator, a workload owner is susceptible to impersonation if either \n\n* they `set` a new manifest and don't compare the root CA cert with the existing one (this is the default of the `contrast` CLI) or\n* they `verify` the coordinator and don't compare the root CA cert with a trusted reference.\n\nUnder these circumstances, the attacker can:\n\n* Issue certificates that chain back to the attacker coordinator's root CA.\n* Recover arbitrary workload secrets of workloads deployed after the attack.\n\nThis issue does **not** affect the following:\n\n* secrets of the legitimate coordinator (seed, workload secrets, CA)\n* integrity of workloads, even when used with the rogue coordinator\n* certificates chaining back to the mesh CA\n\n### Patches\n\nThis issue is patched in Contrast v1.4.1.\n\n### Workarounds\n\nThe issue can be avoided by verifying the coordinator root CA cert against expectations.\n\n* At the first `set` call, keep a copy of the CA cert returned by the coordinator.\n* After subsequent `set` or `verify` calls, compare the returned CA cert with the backup copy. If it matches bit-for-bit, the coordinator is legitimate.","state":0,"publishedAt":"2025-02-05T21:30:35+00:00","modifiedAt":"2026-09-27T11:55:52.460632+00:00","affected":[{"ecosystem":"Go","name":"github.com/edgelesssys/contrast","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.4.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/edgelesssys/contrast/security/advisories/GHSA-vqv5-385r-2hf8","https://github.com/edgelesssys/contrast","https://pkg.go.dev/vuln/GO-2025-3455"],"sourceUrl":"https://github.com/advisories/GHSA-vqv5-385r-2hf8","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-vqv5-385r-2hf8","identifiers":["GHSA-vqv5-385r-2hf8","CVE-2025-71426","GO-2025-3455"]},"retained":false,"historicalAffected":[]}],"coverage":[]}