{"cve":"CVE-2026-55088","nvd":{"published":"2026-08-19T20:17:17.883","modified":"2026-09-09T21:15:59.613","status":"Deferred","description":"Etherpad is a real-time collaborative editor. From 2.6.0 until 3.1.0, Etherpad's src/node/hooks/express/tokenTransfer.ts uses POST /tokenTransfer to store an author token for transfer between browsers and exposes it through GET /tokenTransfer/{uuid}. Although the record includes createdAt, the transfer has no expiration check, is not removed after successful redemption, and is returned by res.send(tokenData), including the raw author token. An unauthenticated attacker who obtains a transfer UUID can repeatedly redeem it, receive fresh author cookies, read the cleartext token, and impersonate the originating author for pad read and write operations. This issue is fixed in version 3.1.0.","cvss_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N","score":6.8},"cwes":["CWE-200","CWE-294"],"references":["https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996","https://github.com/ether/etherpad/pull/7784","https://github.com/ether/etherpad/security/advisories/GHSA-vqfp-p66c-xrp9","https://github.com/ether/etherpad/tree/3.1.0"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:49:38.260478770+00:00"},"epss":{"cve":"CVE-2026-55088","score":0.00439,"percentile":0.38175,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-vqfp-p66c-xrp9","url":"https://osv.dev/vulnerability/GHSA-vqfp-p66c-xrp9","summary":"ep_etherpad-lite: Device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartext author token","modified":"2026-08-13T14:25:58.170243Z","packages":[{"ecosystem":"npm","name":"ep_etherpad-lite","purl":"pkg:npm/ep_etherpad-lite","ranges":[">=2.6.0 <3.1.0"],"fixed":["3.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}