# CVE-2026-55088

## Summary

- **CVE ID:** CVE-2026-55088
- **Severity:** MEDIUM
- **CVSS Score:** 6.8 (CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:N)
- **CWE:** CWE-200, CWE-294
- **Published:** Aug 19, 2026
- **Last Modified:** Aug 21, 2026

## 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.

## Affected Products

- ether — etherpad (>= 2.6.0, < 3.1.0)

## References

- [CNA](https://github.com/ether/etherpad/security/advisories/GHSA-vqfp-p66c-xrp9)
- [CNA](https://github.com/ether/etherpad/pull/7784)
- [CNA](https://github.com/ether/etherpad/commit/8c6104c5d5daf41f0d454acc04d42dffa0e0d996)
- [CNA](https://github.com/ether/etherpad/tree/3.1.0)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.36%
- **EPSS Percentile:** 29.0

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._