{"cve":"CVE-2022-39200","nvd":{"published":"2022-09-12T20:15:12.960","modified":"2026-06-17T04:57:54.137","status":"Modified","description":"Dendrite is a Matrix homeserver written in Go. In affected versions events retrieved from a remote homeserver using the `/get_missing_events` path did not have their signatures verified correctly. This could potentially allow a remote homeserver to provide invalid/modified events to Dendrite via this endpoint. Note that this does not apply to events retrieved through other endpoints (e.g. `/event`, `/state`) as they have been correctly verified. Homeservers that have federation disabled are not vulnerable. The problem has been fixed in Dendrite 0.9.8. Users are advised to upgrade. There are no known workarounds for this issue.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N","score":5.3},"cwes":["CWE-347"],"references":["https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3","https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c","https://github.com/matrix-org/dendrite/commit/2792d0490f3771488bad346981b8c26479a872c3","https://github.com/matrix-org/dendrite/security/advisories/GHSA-pfw4-xjgm-267c"],"products":["matrix:dendrite"],"source":"nvd","synced_at":"2026-10-19T21:35:14.992143698+00:00"},"epss":{"cve":"CVE-2022-39200","score":0.00361,"percentile":0.29907,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-pfw4-xjgm-267c","url":"https://osv.dev/vulnerability/GHSA-pfw4-xjgm-267c","summary":"Dendrite signature checks not applied to some retrieved missing events","modified":"2024-08-21T16:28:42.702294Z","packages":[{"ecosystem":"Go","name":"github.com/matrix-org/dendrite","purl":"pkg:golang/github.com/matrix-org/dendrite","ranges":["<0.9.8"],"fixed":["0.9.8"]}]},{"id":"GO-2022-0989","url":"https://osv.dev/vulnerability/GO-2022-0989","summary":"Dendrite signature checks not applied to some retrieved missing events in github.com/matrix-org/dendrite","modified":"2026-03-03T04:52:33.391464Z","packages":[{"ecosystem":"Go","name":"github.com/matrix-org/dendrite","purl":"pkg:golang/github.com/matrix-org/dendrite","ranges":["<0.9.8"],"fixed":["0.9.8"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}