{"id":"CVE-2026-52890","state":"PUBLISHED","title":"Wekan: Arbitrary file read and server DoS via attachment versions.original.path","description":"Wekan is open source kanban built with Meteor. Prior to 9.31, Wekan allows a logged-in board member to insert an attachment document through the /attachments/insert DDP method with attacker-controlled versions.original.path and versions.original.storage fields. The server/permissions/attachments.js insert rule checks only board write access, and FileStoreStrategyFilesystem.getReadStream() in models/lib/fileStoreStrategy.js streams the stored path without a storage-root containment check, allowing arbitrary file reads and denial of service through special files such as /dev/zero. This issue is fixed in version 9.31.","publishedAt":"2026-07-15T21:07:16.921Z","updatedAt":"2026-07-16T12:59:24.289Z","severity":{"score":7.1,"label":"High","version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L","source":"GitHub_M"},"assigner":"GitHub_M","products":["wekan wekan"],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.31","status":"affected"}]}],"references":["https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88","https://github.com/wekan/wekan/commit/fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8","https://github.com/wekan/wekan/releases/tag/v9.31"],"weaknesses":["CWE-22","CWE-400"],"ingestedAt":"2026-10-29T20:12:16.098Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/52xxx/CVE-2026-52890.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-52890","state":"PUBLISHED","datePublished":"2026-07-15T21:07:16.921Z","dateUpdated":"2026-07-16T12:59:24.289Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-06-08T21:44:27.365Z"},"containers":{"cna":{"title":"Wekan: Arbitrary file read and server DoS via attachment versions.original.path","descriptions":[{"lang":"en","value":"Wekan is open source kanban built with Meteor. Prior to 9.31, Wekan allows a logged-in board member to insert an attachment document through the /attachments/insert DDP method with attacker-controlled versions.original.path and versions.original.storage fields. The server/permissions/attachments.js insert rule checks only board write access, and FileStoreStrategyFilesystem.getReadStream() in models/lib/fileStoreStrategy.js streams the stored path without a storage-root containment check, allowing arbitrary file reads and denial of service through special files such as /dev/zero. This issue is fixed in version 9.31."}],"affected":[{"vendor":"wekan","product":"wekan","versions":[{"version":"< 9.31","status":"affected"}]}],"references":[{"url":"https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88","name":"https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/wekan/wekan/commit/fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8","name":"https://github.com/wekan/wekan/commit/fc92b342ceedcf38dbd614a0f7b50d6dc2b22eb8","tags":["x_refsource_MISC"]},{"url":"https://github.com/wekan/wekan/releases/tag/v9.31","name":"https://github.com/wekan/wekan/releases/tag/v9.31","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV3_1":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"LOW","baseScore":7.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"NONE","privilegesRequired":"LOW","scope":"UNCHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:L","version":"3.1"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-22","lang":"en","description":"CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-400","lang":"en","description":"CWE-400: Uncontrolled Resource Consumption","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-15T21:07:16.921Z"},"source":{"advisory":"GHSA-g6vm-7757-pr88","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","references":[{"url":"https://github.com/wekan/wekan/security/advisories/GHSA-g6vm-7757-pr88","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-16T12:59:05.040500Z","id":"CVE-2026-52890","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-16T12:59:24.289Z"}}]}}}