CVE-2026-55759: Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13…

PriorityP347high7.4CVSS 3.1

AVNACHPRNUINSUCHIHAN

EPSS

0.24%

15.4th percentile

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, Rocket.Chat's Apple Sign-In handler verifies JWT signatures but skips claims validation. Any Apple-signed JWT with a non-empty iss is accepted regardless of aud, exp, nbf, or nonce. An attacker who obtains a target user's Apple identity token (from server logs, an intercepted sign-in flow, or another application sharing the same Apple developer team) can replay it to authenticate as that user, with no expiration on the replay window. This vulnerability is fixed in 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13.

Affected

7 ranges

Vendor	Product	Version range	Fixed in
rocketchat	rocket.chat	< 7.10.13	7.10.13
rocketchat	rocket.chat	—	—
rocketchat	rocket.chat	—	—
rocketchat	rocket.chat	—	—
rocketchat	rocket.chat	—	—
rocketchat	rocket.chat	—	—
rocketchat	rocket.chat	—	—

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