ether Etherpad up to 3.0.x Token Transfer tokenTransfer.ts missing encryption

Summaryinfo

A vulnerability classified as problematic has been found in ether Etherpad up to 3.0.x. The affected element is an unknown function of the file src/node/hooks/express/tokenTransfer.ts of the component Token Transfer. Performing a manipulation results in missing encryption. This vulnerability is cataloged as CVE-2026-55088. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability classified as problematic has been found in ether Etherpad up to 3.0.x. This affects some unknown processing of the file src/node/hooks/express/tokenTransfer.ts of the component Token Transfer. The manipulation with an unknown input leads to a missing encryption vulnerability. CWE is classifying the issue as CWE-311. The product does not encrypt sensitive or critical information before storage or transmission. This is going to have an impact on confidentiality. The summary by CVE is:

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.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-55088 since 06/16/2026. The exploitability is told to be difficult. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details of the vulnerability are known, but there is no available exploit. The attack technique deployed by this issue is T1600 according to MITRE ATT&CK.

Upgrading to version 3.1.0 eliminates this vulnerability.

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Productinfo

Vendor

• ether

Name

• Etherpad

Version

• 3.0

Website

• Product: https://github.com/ether/etherpad/

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