{"id":"CVE-2026-55420","state":"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.","publishedAt":"2026-07-09T17:54:07.940Z","updatedAt":"2026-07-14T01:08:46.909Z","severity":{"score":7.5,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","source":"GitHub_M"},"assigner":"GitHub_M","products":["discourse discourse"],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.5.0-latest, < 2026.5.1","status":"affected"},{"version":">= 2026.4.0-latest, < 2026.4.2","status":"affected"},{"version":">= 2026.1.0-latest, < 2026.1.5","status":"affected"}]}],"references":["https://github.com/discourse/discourse/security/advisories/GHSA-7wq5-jgww-5rw3","https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914","https://github.com/discourse/discourse/releases/tag/v2026.1.5","https://github.com/discourse/discourse/releases/tag/v2026.4.2","https://github.com/discourse/discourse/releases/tag/v2026.5.1","https://github.com/discourse/discourse/releases/tag/v2026.6.0"],"weaknesses":["CWE-78"],"ingestedAt":"2026-10-29T20:12:24.861Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/55xxx/CVE-2026-55420.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55420","state":"PUBLISHED","datePublished":"2026-07-09T17:54:07.940Z","dateUpdated":"2026-07-14T01:08:46.909Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-16T21:48:43.125Z"},"containers":{"cna":{"title":"Discourse: Remote code execution via pdf uploads","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"discourse","product":"discourse","versions":[{"version":">= 2026.5.0-latest, < 2026.5.1","status":"affected"},{"version":">= 2026.4.0-latest, < 2026.4.2","status":"affected"},{"version":">= 2026.1.0-latest, < 2026.1.5","status":"affected"}]}],"references":[{"url":"https://github.com/discourse/discourse/security/advisories/GHSA-7wq5-jgww-5rw3","name":"https://github.com/discourse/discourse/security/advisories/GHSA-7wq5-jgww-5rw3","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914","name":"https://github.com/discourse/discourse/commit/ca5a7e06167561928556afa2f237d67e459c6914","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","name":"https://github.com/discourse/discourse/releases/tag/v2026.1.5","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","name":"https://github.com/discourse/discourse/releases/tag/v2026.4.2","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","name":"https://github.com/discourse/discourse/releases/tag/v2026.5.1","tags":["x_refsource_MISC"]},{"url":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","name":"https://github.com/discourse/discourse/releases/tag/v2026.6.0","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"NETWORK","availabilityImpact":"HIGH","baseScore":7.5,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-78","lang":"en","description":"CWE-78: Improper Neutralization of Special Elements used in an OS Command ('OS Command Injection')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-09T17:54:07.940Z"},"source":{"advisory":"GHSA-7wq5-jgww-5rw3","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-14T01:08:36.928611Z","id":"CVE-2026-55420","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"total"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-14T01:08:46.909Z"}}]}}}