CVE-2026-55088: fallo de gravedad media en etherpad
Etherpad: Device-to-device author-token transfer endpoint is replayable, never expires, and exposes the cleartext author token
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
13Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 6.8epss 0.4%
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:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N
Productos afectados
ether · etherpadCVEs relacionadas — etherpad
En el mismo producto, de las más peligrosas a las menos.
CVE-2026-55087MEDIUMEtherpad: x-proxy-path header reflected into admin HTML/JS/CSS (cache-poisoning XSS) and concatenated into redirect (open-redirect)EPSS 0.6%CVE-2026-55090MEDIUMEtherpad: Stored XSS in HTML export via unescaped attribute-pool valuesEPSS 0.5%CVE-2026-55085CRITICALEtherpad: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') in etherpad-liteEPSS 0.5%CVE-2026-55089CRITICALEtherpad: JWT `admin` claim presence-only check lets non-admin OAuth users invoke every Etherpad HTTP API endpointEPSS 0.5%CVE-2026-55086MEDIUMEtherpad: Import/export use Math.random() for temp file paths; predictable paths on shared /tmp enable symlink-based file overwriteEPSS 0.1%