{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-55086","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","state":"PUBLISHED","assignerShortName":"GitHub_M","dateReserved":"2026-06-16T14:41:54.578Z","datePublished":"2026-08-19T19:35:46.851Z","dateUpdated":"2026-08-25T13:59:03.366Z"},"containers":{"cna":{"title":"Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite","problemTypes":[{"descriptions":[{"cweId":"CWE-59","lang":"en","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-377","lang":"en","description":"CWE-377: Insecure Temporary File","type":"CWE"}]}],"metrics":[{"cvssV3_1":{"attackComplexity":"HIGH","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":4.2,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"LOW","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","version":"3.1"}}],"references":[{"name":"https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h","tags":["x_refsource_CONFIRM"],"url":"https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h"},{"name":"https://github.com/ether/etherpad/pull/7784","tags":["x_refsource_MISC"],"url":"https://github.com/ether/etherpad/pull/7784"},{"name":"https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996","tags":["x_refsource_MISC"],"url":"https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996"},{"name":"https://github.com/ether/etherpad/releases/tag/v3.1.0","tags":["x_refsource_MISC"],"url":"https://github.com/ether/etherpad/releases/tag/v3.1.0"}],"affected":[{"vendor":"ether","product":"etherpad","versions":[{"version":"< 3.1.0","status":"affected"}]}],"providerMetadata":{"orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M","dateUpdated":"2026-08-19T19:35:46.851Z"},"descriptions":[{"lang":"en","value":"Etherpad is a real-time collaborative editor. Prior to 3.1.0, src/node/handler/ImportHandler.ts and src/node/handler/ExportHandler.ts derive temporary filenames from Math.random() and place them in os.tmpdir(). On a host with a shared world-writable temporary directory, a local unprivileged attacker who predicts a filename can precreate a symbolic link to a file writable by the Etherpad process. Subsequent import or export operations can follow the link through fs.writeFile, fs.rename, or document-conversion output and overwrite the target with partially attacker-controlled content. This issue is fixed in version 3.1.0."}],"source":{"advisory":"GHSA-2jwf-f4xq-f24h","discovery":"UNKNOWN"}},"adp":[{"references":[{"url":"https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h","tags":["exploit"]}],"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-25T13:58:06.173795Z","id":"CVE-2026-55086","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-08-25T13:59:03.366Z"}}]}}