{"id":"CVE-2026-34213","state":"PUBLISHED","title":"Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation","description":"Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch.","publishedAt":"2026-04-14T21:49:55.380Z","updatedAt":"2026-04-15T13:31:17.467Z","severity":{"score":5.4,"label":"Medium","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["docmost docmost"],"affected":[{"vendor":"docmost","product":"docmost","versions":[{"version":">= 0.3.0, < 0.71.0","status":"affected"}]}],"references":["https://github.com/docmost/docmost/security/advisories/GHSA-89fp-2hch-j9gp"],"weaknesses":["CWE-639"],"ingestedAt":"2026-10-29T20:11:40.391Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/34xxx/CVE-2026-34213.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-34213","state":"PUBLISHED","datePublished":"2026-04-14T21:49:55.380Z","dateUpdated":"2026-04-15T13:31:17.467Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-03-26T15:57:52.324Z"},"containers":{"cna":{"title":"Docmost has cross-page attachment overwrite via flawed attachmentId overwrite validation","descriptions":[{"lang":"en","value":"Docmost is open-source collaborative wiki and documentation software. Starting in version 0.3.0 and prior to version 0.71.0, improper authorization in Docmost allows a low-privileged authenticated user to overwrite another page's attachment within the same workspace by supplying a victim `attachmentId` to `POST /api/files/upload`. This is a remote integrity issue requiring no victim interaction. Version 0.71.0 contains a patch."}],"affected":[{"vendor":"docmost","product":"docmost","versions":[{"version":">= 0.3.0, < 0.71.0","status":"affected"}]}],"references":[{"url":"https://github.com/docmost/docmost/security/advisories/GHSA-89fp-2hch-j9gp","name":"https://github.com/docmost/docmost/security/advisories/GHSA-89fp-2hch-j9gp","tags":["x_refsource_CONFIRM"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":5.4,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-639","lang":"en","description":"CWE-639: Authorization Bypass Through User-Controlled Key","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-04-14T21:49:55.380Z"},"source":{"advisory":"GHSA-89fp-2hch-j9gp","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-15T13:31:11.461730Z","id":"CVE-2026-34213","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-04-15T13:31:17.467Z"}}]}}}