---
id: CVE-2026-55086
title: Etherpad is a real-time collaborative editor
summary: >-
  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 wo…
severity: medium
cvss: 4.2
cvssVector: 'CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:C/C:L/I:L/A:N'
cwe:
  - CWE-59
  - CWE-377
vendor: ep_etherpad-lite
product: ep_etherpad-lite
affected:
  - ep_etherpad-lite <= 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-2026-55086'
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/releases/tag/v3.1.0'
    label: security-advisories@github.com
  - url: 'https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h'
    label: security-advisories@github.com
  - url: 'https://github.com/ether/etherpad/security/advisories/GHSA-2jwf-f4xq-f24h'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
  - url: 'https://github.com/advisories/GHSA-2jwf-f4xq-f24h'
tags:
  - nvd
  - ghsa
  - npm
epss: 0.00175
epssPercentile: 0.07308
aliases:
  - GHSA-2jwf-f4xq-f24h
ecosystem: npm
ingestedAt: '2026-08-13T15:03:46.197Z'
---

## Overview

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.

## Remediation

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

## Package advisory (CVE-2026-55086)

Affected packages:

- `ep_etherpad-lite <= 3.0.0`

Patched in:

- `ep_etherpad-lite 3.1.0`

Source: https://github.com/advisories/GHSA-2jwf-f4xq-f24h