{"api_version":"1","generated_at":"2026-08-22T00:27:14+00:00","cve":"CVE-2026-55086","urls":{"html":"https://cve.report/CVE-2026-55086","api":"https://cve.report/api/cve/CVE-2026-55086.json","docs":"https://cve.report/api","cve_org":"https://www.cve.org/CVERecord?id=CVE-2026-55086","nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-55086"},"summary":{"title":"Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite","description":"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.","state":"PUBLISHED","assigner":"GitHub_M","published_at":"2026-08-19 20:17:17","updated_at":"2026-08-19 20:17:17"},"problem_types":["CWE-59","CWE-377","CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following')","CWE-377 CWE-377: Insecure Temporary File"],"metrics":[{"version":"3.1","source":"security-advisories@github.com","type":"Secondary","score":"4.2","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","data":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","baseScore":4.2,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"}},{"version":"3.1","source":"CNA","type":"DECLARED","score":"4.2","severity":"MEDIUM","vector":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","data":{"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":[{"url":"https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996","name":"https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/ether/etherpad/releases/tag/v3.1.0","name":"https://github.com/ether/etherpad/releases/tag/v3.1.0","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h","name":"https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://github.com/ether/etherpad/pull/7784","name":"https://github.com/ether/etherpad/pull/7784","refsource":"security-advisories@github.com","tags":[],"title":"","mime":"","httpstatus":"","archivestatus":"0"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-55086","name":"CVE Program record","refsource":"CVE.ORG","tags":["canonical"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-55086","name":"NVD vulnerability detail","refsource":"NVD","tags":["canonical","analysis"]}],"affected":[{"source":"CNA","vendor":"ether","product":"etherpad","version":"affected < 3.1.0","platforms":[]}],"timeline":[],"solutions":[],"workarounds":[],"exploits":[],"credits":[],"nvd_cpes":[],"vendor_comments":[],"enrichments":{"kev":null,"epss":{"cve_year":"2026","cve_id":"55086","cve":"CVE-2026-55086","epss":"0.001390000","percentile":"0.037650000","score_date":"2026-08-20","updated_at":"2026-08-21 00:13:52"},"legacy_qids":[]},"source_records":{"cve_program":{"containers":{"cna":{"affected":[{"product":"etherpad","vendor":"ether","versions":[{"status":"affected","version":"< 3.1.0"}]}],"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."}],"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"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-59","description":"CWE-59: Improper Link Resolution Before File Access ('Link Following')","lang":"en","type":"CWE"}]},{"descriptions":[{"cweId":"CWE-377","description":"CWE-377: Insecure Temporary File","lang":"en","type":"CWE"}]}],"providerMetadata":{"dateUpdated":"2026-08-19T19:35:46.851Z","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","shortName":"GitHub_M"},"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"}],"source":{"advisory":"GHSA-2jwf-f4xq-f24h","discovery":"UNKNOWN"},"title":"Etherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwrite"}},"cveMetadata":{"assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","assignerShortName":"GitHub_M","cveId":"CVE-2026-55086","datePublished":"2026-08-19T19:35:46.851Z","dateReserved":"2026-06-16T14:41:54.578Z","dateUpdated":"2026-08-19T19:35:46.851Z","state":"PUBLISHED"},"dataType":"CVE_RECORD","dataVersion":"5.2"},"nvd":{"publishedDate":"2026-08-19 20:17:17","lastModifiedDate":"2026-08-19 20:17:17","problem_types":["CWE-59","CWE-377","CWE-59 CWE-59: Improper Link Resolution Before File Access ('Link Following')","CWE-377 CWE-377: Insecure Temporary File"],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N","baseScore":4.2,"baseSeverity":"MEDIUM","attackVector":"LOCAL","attackComplexity":"HIGH","privilegesRequired":"LOW","userInteraction":"NONE","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":1.1,"impactScore":2.7}]},"configurations":[]},"legacy_mitre":{"record":{"CveYear":"2026","CveId":"55086","Ordinal":"1","Title":"Etherpad: Import/export use Math.random() for temp file paths; p","CVE":"CVE-2026-55086","Year":"2026"},"notes":[{"CveYear":"2026","CveId":"55086","Ordinal":"1","NoteData":"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.","Type":"Description","Title":"Etherpad: Import/export use Math.random() for temp file paths; p"}]}}}