{"id":"CVE-2026-55420","aliases":["BIT-discourse-2026-55420","EUVD-2026-42665","GHSA-7wq5-jgww-5rw3"],"status":"published","title":"Discourse: Remote code execution via pdf uploads","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","severity":{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-12","score":0.00603,"percentile":0.49364,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-78"],"published":"2026-07-09T17:54:07Z","modified":"2026-10-28T02:30:37Z","fixes":[{"ecosystem":"Bitnami","package":"discourse","fixed_in":["2026.1.5","2026.4.2","2026.5.1","2026.7.0"],"sources":["osv"]}],"affected":[{"source":"osv","ecosystem":"Bitnami","package":"discourse","ranges":[{"type":"SEMVER","events":[{"introduced":"2026.1.0"},{"fixed":"2026.1.5"},{"introduced":"2026.4.0"},{"fixed":"2026.4.2"},{"introduced":"2026.5.0"},{"fixed":"2026.5.1"},{"introduced":"2026.6.0"},{"fixed":"2026.7.0"}]}]}],"products":[{"vendor":"discourse","product":"discourse"}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-7wq5-jgww-5rw3","tags":["x_refsource_CONFIRM","Mitigation","Vendor Advisory","advisory"]},{"url":"https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914","tags":["x_refsource_MISC","Patch","fix"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC","Release Notes","article","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55420","tags":["web","advisory"]},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55420.json","tags":["advisory"]}],"sources":{"cve":[{"id":"CVE-2026-55420","title":"Discourse: Remote code execution via pdf uploads","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T17:54:07.94Z","modified":"2026-07-14T01:08:46.909Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"cna"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:20:11.925815Z"}],"euvd":[{"id":"EUVD-2026-42665","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T17:54:07Z","modified":"2026-07-14T01:08:46Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"updated_at":"2026-11-02T18:20:00.696533Z"}],"nvd":[{"id":"CVE-2026-55420","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T18:16:54.44Z","modified":"2026-07-14T02:16:56.05Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"secondary"},{"version":"3.1","score":8.1,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T14:12:28.4135Z"}],"osv":[{"id":"CVE-2026-55420","title":"Discourse: Remote code execution via pdf uploads","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-09T17:54:07.94Z","modified":"2026-10-28T02:30:37.042758241Z","cvss":[{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","level":"high"}],"cwes":["CWE-78"],"updated_at":"2026-11-02T15:45:11.22012Z"},{"id":"BIT-discourse-2026-55420","title":"Discourse: Remote code execution via pdf uploads","description":"Discourse is an open-source discussion platform. Prior to 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5, under certain non-default configurations, processing of PDF uploads could be exploited to obtain RCE on the server. This issue is patched in 2026.6.0, 2026.5.1, 2026.4.2, and 2026.1.5.","status":"published","published":"2026-07-14T08:46:44.451Z","modified":"2026-09-08T08:46:26.611444149Z","updated_at":"2026-11-02T15:28:29.152062Z"}]}}