CVE-2026-55759

HIGH

Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audience token replay

Title source: cna
STIX 2.1

Description

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.

References (1)

Core 1
Core References

Scores

CVSS v3 7.4
EPSS 0.0024
EPSS Percentile 15.7%
Attack Vector NETWORK
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

CISA SSVC

Vulnrichment
Exploitation none
Automatable no
Technical Impact total

Details

CWE
CWE-287 CWE-294
Status published
Products (7)
RocketChat/Rocket.Chat < 7.10.13
RocketChat/Rocket.Chat >= 7.11.0-rc.0, < 8.0.7
RocketChat/Rocket.Chat >= 8.1.0-rc.0, < 8.1.6
RocketChat/Rocket.Chat >= 8.2.0-rc.0, < 8.2.6
RocketChat/Rocket.Chat >= 8.3.0-rc.0, < 8.3.6
RocketChat/Rocket.Chat >= 8.4.0-rc.0, < 8.4.4
RocketChat/Rocket.Chat >= 8.5.0-rc.0, < 8.5.1
Published Jun 24, 2026
Tracked Since Jun 25, 2026