CVE-2026-55666
- Source
- https://cve.org/CVERecord?id=CVE-2026-55666
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-55666.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-55666
- Aliases
-
- GHSA-wx3c-76rf-wpwf
- Published
- 2026-06-24T21:06:55.637Z
- Modified
- 2026-07-15T01:49:02.824024410Z
- Severity
-
- 9.3 (Critical) CVSS_V4 - 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 CVSS Calculator
- Summary
- Rocket.Chat: Email Parameter Fallback Leads To Account Takeover Within Apple OAuth
- Details
-
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.
- Database specific
{ "cwe_ids": [ "CWE-287", "CWE-288" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/55xxx/CVE-2026-55666.json", "cna_assigner": "GitHub_M" }- References
Affected packages
Git / github.com/rocketchat/rocket.chat
Affected ranges
- Type
- GIT
- Repo
- https://github.com/rocketchat/rocket.chat
- Events
-
IntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroducedFixedIntroduced0 Unknown introduced commit / All previous commits are affectedFixed
- Database specific
{ "extracted_events": [ { "introduced": "8.5.0-rc.0" }, { "fixed": "8.5.1" }, { "introduced": "8.4.0-rc.0" }, { "fixed": "8.4.4" }, { "introduced": "8.3.0-rc.0" }, { "fixed": "8.3.6" }, { "introduced": "8.2.0-rc.0" }, { "fixed": "8.2.6" }, { "introduced": "8.1.0-rc.0" }, { "fixed": "8.1.6" }, { "introduced": "7.11.0-rc.0" }, { "fixed": "8.0.7" }, { "introduced": "0" }, { "fixed": "7.10.13" } ], "source": "AFFECTED_FIELD" }
Affected versions
0.*
0.10.0
0.10.1
0.10.2
0.11.0
0.13.0
0.14.0
0.15.0
0.16.0
0.17.0
0.18.0
0.19.0
0.23.0
0.24.0
0.25.0
0.26.0
0.27.0
0.28.0
0.29.0
0.30.0
0.36.0
0.37.0
0.37.1
0.38.0
0.39.0
0.40.0
0.40.1
0.41.0
0.42.0
0.43.0
0.44.0
0.45.0
0.46.0
0.48.0
0.49.0
0.49.1
0.49.2
0.49.3
0.49.4
0.50.0
0.54.0
0.54.1
0.56.0
0.56.0-rc.0
0.56.0-rc.1
0.56.0-rc.2
0.56.0-rc.3
0.56.0-rc.4
0.56.0-rc.5
0.56.0-rc.6
0.56.0-rc.7
0.57.0
0.57.1
0.57.2
0.58.0
0.58.1
0.58.2
0.59.0
0.59.1
0.59.2
0.59.3
0.59.4
0.59.5
0.59.6
0.60.0
0.60.1
0.60.2
0.60.3
0.60.4
0.61.0
0.61.1
0.61.2
0.62.0
0.62.1
0.62.2
0.63.0
0.63.1
0.63.2
0.63.3
0.64.0
0.64.1
0.64.2
0.65.0
0.65.1
0.65.2
0.66.0
0.66.1
0.66.2
0.66.3
0.67.0
0.68.0
0.68.1
0.68.2
0.68.3
0.68.4
0.68.5
0.69.0
0.69.1
0.69.2
0.70.0
0.70.1
0.70.2
0.70.3
0.70.4
0.71.0
0.71.1
0.72.0
0.72.1
0.72.2
0.72.3
0.73.0
0.73.1
0.73.2
0.74.0
0.74.1
0.74.2
0.74.3
0.8.0
1.*
1.0.0
1.0.1
1.0.2
1.0.3
1.1.0
1.1.1
1.1.2
1.1.3
1.2.0
1.2.1
1.3.0
1.3.1
1.3.2
2.*
2.0.0
2.1.0
2.1.1
2.1.2
2.2.0
2.3.0
2.3.1
2.3.2
2.4.0
2.4.1
2.4.2
2.4.3
2.4.4
2.4.5
2.4.6
2.4.7
2.4.8
2.4.9
3.*
3.0.0
3.0.1
3.0.10
3.0.11
3.0.12
3.0.2
3.0.3
3.0.4
3.0.5
3.0.6
3.0.7
3.0.8
3.0.9
3.1.0
3.1.1
3.1.2
3.10.0
3.10.1
3.10.2
3.10.3
3.10.4
3.10.5
3.11.0
3.11.1
3.12.0
3.12.1
3.12.2
3.12.3
3.13.0
3.13.1
3.13.2
3.13.3
3.14.0
3.14.1
3.14.2
3.14.3
3.14.4
3.15.0
3.15.1
3.15.2
3.16.0
3.16.1
3.16.2
3.16.3
3.16.4
3.17.0
3.17.1
3.17.2
3.18.0
3.18.1
3.18.2
3.2.0
3.2.1
3.2.2
3.3.0
3.3.1
3.3.2
3.3.3
3.4.0
3.4.1
3.4.2
3.5.0
3.5.1
3.5.2
3.5.3
3.5.4
3.6.0
3.6.1
3.6.2
3.6.3
3.7.0
3.7.1
3.7.2
3.8.0
3.8.1
3.8.2
3.9.0
3.9.1
3.9.2
3.9.3
4.*
4.0.0
4.0.1
4.0.2
4.0.3
4.0.4
4.0.5
4.1.0
4.1.1
4.1.2
4.2.0
4.2.1
4.2.2
4.3.0
4.3.1
4.3.2
4.3.3
4.4.0
4.4.1
4.4.2
4.4.4
4.5.0
4.5.1
4.5.2
4.5.3
4.5.4
4.5.5
4.6.0
4.6.1
4.6.2
4.6.3
4.7.0
4.7.1
4.7.2
4.7.3
4.8.0
4.8.2
5.*
5.0.0
5.0.1
5.0.2
5.0.3
5.0.4
5.0.5
5.1.0
5.1.1
5.1.3
5.1.4
5.2.0
5.3.0
5.3.1
5.3.2
5.3.4
5.3.5
5.4.0
5.4.1
5.4.2
5.4.3
5.4.4
6.*
6.0.0
7.*
7.10.0
7.10.1
7.10.10
7.10.11
7.10.12
7.10.2
7.10.3
7.10.4
7.10.5
7.10.6
7.10.7
7.10.8
7.10.9
7.11.0
7.12.0
7.12.1
7.12.2
7.13.0
7.13.1
7.13.2
7.8.0
7.8.0-rc.0
7.8.0-rc.1
7.8.1
7.8.2
7.8.3
7.9.0
7.9.1
7.9.3
8.*
8.0.0
8.0.1
8.0.2
8.0.3
8.0.4
8.0.5
8.0.6
8.1.0
8.1.1
8.1.2
8.1.3
8.1.4
8.1.5
8.2.0
8.2.1
8.2.2
8.2.3
8.2.4
8.2.5
8.3.0
8.3.1
8.3.2
8.3.3
8.3.4
8.3.5
8.4.0
8.4.1
8.4.2
8.4.3
8.5.0