CakePHP is a rapid development framework for PHP. Prior to versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7 on their respective release lines, custom mail headers added with Message::setHeaders() or Message::addHeaders() do not have CRLF bytes removed, allowing header injection when user-controlled data is used in message headers. This issue is fixed in versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7.

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements Present

User Interaction None

Vulnerable System Confidentiality Impact None

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact None

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

No CVSS v3.1

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00312.

Exploitation none

Automatable no

Technical Impact partial

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
cakephp cakephp affected
Version Status Constraints
>= 4.5.0, < 4.5.12 affected —
>= 4.6.0, < 4.6.5 affected —
>= 5.0.0, < 5.1.9 affected —
>= 5.2.0, < 5.2.14 affected —
>= 5.3.0, < 5.3.7 affected —

No data.

No data.

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Project Subscriptions

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-2qh5-382h-3jpc CakePHP: SmtpTransport vulnerable to CRLF header injection
Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/cakephp/cakephp/commit/08188962bcd99a95da1e49f62e786f2d688f1e41 cve-icon cve-icon
https://github.com/cakephp/cakephp/commit/2afe42b02d8ddc5d442bca5e8bb61910a727646e cve-icon cve-icon
https://github.com/cakephp/cakephp/commit/3e09dae6cbdc983754fa3a8e6aae74da102a3ea1 cve-icon cve-icon
https://github.com/cakephp/cakephp/commit/b67b622457362b075bb37e625a82af73a0b3c9c3 cve-icon cve-icon
https://github.com/cakephp/cakephp/security/advisories/GHSA-2qh5-382h-3jpc cve-icon cve-icon
History

Tue, 25 Aug 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}

Mon, 24 Aug 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Cakephp
Cakephp cakephp
Vendors & Products Cakephp
Cakephp cakephp

Mon, 24 Aug 2026 20:45:00 +0000

Type Values Removed Values Added
Description CakePHP is a rapid development framework for PHP. Prior to versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7 on their respective release lines, custom mail headers added with Message::setHeaders() or Message::addHeaders() do not have CRLF bytes removed, allowing header injection when user-controlled data is used in message headers. This issue is fixed in versions 4.5.12, 4.6.5, 5.1.8, 5.2.14, and 5.3.7.
Title CakePHP: SmtpTransport vulnerable to CRLF header injection
Weaknesses CWE-93
References
Metrics cvssV4_0

{'score': 8.2, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N'}

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-08-25T19:23:40.053Z

Reserved: 2026-08-20T20:52:01.927Z

Link: CVE-2026-77634

cve-icon Vulnrichment

Updated: 2026-08-25T18:32:33.699Z

cve-icon NVD

Status : Deferred

Published: 2026-08-24T21:17:48.307

Modified: 2026-09-09T21:06:39.057

Link: CVE-2026-77634

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-08-24T21:45:03Z

Weaknesses