{"id":"CVE-2026-55420","summary":"Discourse: Remote code execution via pdf uploads","details":"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.","aliases":["BIT-discourse-2026-55420","GHSA-7wq5-jgww-5rw3"],"modified":"2026-08-12T03:51:20.266505937Z","published":"2026-07-09T17:54:07.940Z","database_specific":{"cwe_ids":["CWE-78"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55420.json","cna_assigner":"GitHub_M"},"references":[{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1"},{"type":"WEB","url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55420.json"},{"type":"ADVISORY","url":"https://github.com/discourse/discourse/security/advisories/GHSA-7wq5-jgww-5rw3"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55420"},{"type":"FIX","url":"https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/discourse/discourse","events":[{"introduced":"322d3c0ac6a8f133b3f82875e9dbbe310f638c1b"},{"fixed":"c06899647d758493d95a5b301e573ffa3db1e878"},{"introduced":"fdd750d960e603415db62242eca3c30d68e366db"},{"fixed":"4bbdddfc6700ca23604242111d4fa0e00347af97"},{"introduced":"640840d818f4ee9375829ece0ef452923bb0c012"},{"fixed":"598586ccf2e046a25d4b54132e4e1feb47f24e98"},{"introduced":"06d03da34c4ed09ea59f917f045ba250d2b6320d"},{"fixed":"ca5a7e06167561928556afa2f237d67e459c6914"},{"fixed":"06d03da34c4ed09ea59f917f045ba250d2b6320d"}],"database_specific":{"cpe":["cpe:2.3:a:discourse:discourse:*:*:*:*:*:*:*:*","cpe:2.3:a:discourse:discourse:2026.6.0:*:*:*:latest:*:*:*"],"extracted_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"},{"last_affected":"2026.6.0"}],"source":["CPE_RANGE","CPE_STRING","REFERENCES"]}}],"versions":["2026.6.0","v2026.5.0","v2026.6.0-latest","v2026.1.4","v2026.4.1","v2026.5.0-latest.1","v2026.4.0","v2026.5.0-latest","v2026.1.3","v2026.4.0-latest","v2026.1.2","v2026.1.1","v2026.1.0","stable","esr","v2026.1.0-latest"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55420.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H"}]}