{"action":"Upgrade lemmy_api_common to 0.19.18 or later.","affected":[{"fixed":"0.19.18","introduced":"0"}],"component":"lemmy_api_common","cve_ids":["CVE-2026-42180"],"ecosystem":"crates.io","epss":0.00184,"exploited":false,"fixed_versions":["0.19.18"],"ghsa_id":"GHSA-3jvj-v6w2-h948","id":"tcs_01M5KERZK11BJF5094X8GJVTVP","modified_at":"2026-05-13T13:56:07.079912Z","published_at":"2026-04-24T15:22:49Z","references":["https://osv.dev/vulnerability/GHSA-3jvj-v6w2-h948","https://github.com/LemmyNet/lemmy/security/advisories/GHSA-3jvj-v6w2-h948","https://nvd.nist.gov/vuln/detail/CVE-2026-42180","https://github.com/LemmyNet/lemmy/commit/1f06693b708020c5c3a3752bd2f1c6006a75e9bc","https://github.com/LemmyNet/lemmy","https://github.com/LemmyNet/lemmy/releases/tag/0.19.18"],"severity":{"label":"medium","score":6.3},"sources":[{"source":"osv","source_id":"GHSA-3jvj-v6w2-h948","url":"https://osv.dev/vulnerability/GHSA-3jvj-v6w2-h948"}],"summary":"Lemmy has SSRF in /api/v3/post via Webmention dispatch"}