Back to overview

CVE-2026-55666

CRITICAL
9.3
CVSS 4.0
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, in apps/meteor/app/apple/server/loginHandler.ts, handleIdentityToken parses a JWT issued by Apple during the OAuth flow. The try block checks for an email parameter. If the JWT does not contain an email address, the application falls back to accepting an arbitrary email value supplied directly in the request. Attackers are able to forge Apple JWTs that do not contain an email address and leverage this vulnerability to carry out account takeover attacks. 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.

Metadata

CVE ID
CVE-2026-55666
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-06-17 00:05 UTC
Published
2026-06-24 21:06 UTC
Last updated
2026-06-24 21:06 UTC
Primary CWE
CWE-287
CWE-287: Improper Authentication
Vendor / Product
RocketChat / Rocket.Chat
Sources
cve.org  ·  NVD

Severity & Metrics

9.3 CRITICAL CVSS 4.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Affected products (1)
VendorProductPlatformVersions
RocketChat Rocket.Chat — >= 8.5.0-rc.0, < 8.5.1, >= 8.4.0-rc.0, < 8.4.4, >= 8.3.0-rc.0, < 8.3.6, >= 8.2.0-rc.0, < 8.2.6 …
Weakness (CWE)
CWESourceDescription
CWE-287 cna CWE-287: Improper Authentication
CWE-288 cna CWE-288: Authentication Bypass Using an Alternate Path or Channel
CVSS scores (1)
ScoreSeverityVersionSourceVector
9.3 CRITICAL 4.0 cna CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
References (1)
Back to overview