CVE-2026-55759 (GCVE-0-2026-55759)

Vulnerability from cvelistv5 – Published: 2026-06-24 21:07 – Updated: 2026-06-26 03:55
VLAI
Title
Rocket.Chat: Apple Sign-In skips JWT claims validation, allowing expired and cross-audience token replay
Summary
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.
Severity
7.4 (High)
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-06-25 00:00 UTC
CWE
  • CWE-287 - Improper Authentication
  • CWE-294 - Authentication Bypass by Capture-replay
Assigner
GitHub_M CNA under the mitre root
CNA scorecard C 72/100 over 7820 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
RocketChat Rocket.Chat Affected: >= 8.5.0-rc.0, < 8.5.1
Affected: >= 8.4.0-rc.0, < 8.4.4
Affected: >= 8.3.0-rc.0, < 8.3.6
Affected: >= 8.2.0-rc.0, < 8.2.6
Affected: >= 8.1.0-rc.0, < 8.1.6
Affected: >= 7.11.0-rc.0, < 8.0.7
Affected: < 7.10.13
guessed Create a notification for this product.
Show details on NVD website
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