---
id: CVE-2026-55088
title: Etherpad is a real-time collaborative editor
summary: >-
  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
  /tokenTra…
severity: medium
cvss: 6.8
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N'
cwe:
  - CWE-200
  - CWE-294
vendor: ep_etherpad-lite
product: ep_etherpad-lite
affected:
  - 'ep_etherpad-lite >= 2.6.0, <= 3.0.0'
patched:
  - ep_etherpad-lite 3.1.0
published: '2026-08-19'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:15:59.613'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-55088'
references:
  - url: >-
      https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996
    label: security-advisories@github.com
  - url: 'https://github.com/ether/etherpad/pull/7784'
    label: security-advisories@github.com
  - url: 'https://github.com/ether/etherpad/security/advisories/GHSA-vqfp-p66c-xrp9'
    label: security-advisories@github.com
  - url: 'https://github.com/ether/etherpad/tree/3.1.0'
    label: security-advisories@github.com
  - url: 'https://github.com/advisories/GHSA-vqfp-p66c-xrp9'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00439
epssPercentile: 0.35537
aliases:
  - GHSA-vqfp-p66c-xrp9
ecosystem: npm
ingestedAt: '2026-08-13T15:03:46.163Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

## Package advisory (CVE-2026-55088)

Affected packages:

- `ep_etherpad-lite >= 2.6.0, <= 3.0.0`

Patched in:

- `ep_etherpad-lite 3.1.0`

Source: https://github.com/advisories/GHSA-vqfp-p66c-xrp9