CVE-2026-77634

CakePHP: SmtpTransport vulnerable to CRLF header injection

HIGH

8.2

CVSS Score

Published: August 24, 2026 at 08:33 PM UTC

Updated: October 12, 2026 at 09:10 PM UTC

1 product affected across 1 vendorCakephp

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Severity

HIGH8.2

Exploit prediction

EPSS 0.5%

SSVC

No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Cakephp · Cakephp

90%

>= 4.5.0, < 4.5.12>= 4.6.0, < 4.6.5>= 5.0.0, < 5.1.9>= 5.2.0, < 5.2.14>= 5.3.0, < 5.3.7

Affected range stops below 4.5.12, so it looks safe — our inference, not a vendor statement

Affected range stops below 4.6.5, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.1.9, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.2.14, so it looks safe — our inference, not a vendor statement

Affected range stops below 5.3.7, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet, and no fixed version or vendor advisory is recorded against it.

References (5)

x_refsource_CONFIRM

Source: cverecord

https://github.com/cakephp/cakephp/security/advisories/GHSA-2qh5-382h-3jpc

x_refsource_MISC

Source: cverecord

https://github.com/cakephp/cakephp/commit/08188962bcd99a95da1e49f62e786f2d688f1e41

x_refsource_MISC

Source: cverecord

https://github.com/cakephp/cakephp/commit/2afe42b02d8ddc5d442bca5e8bb61910a727646e

x_refsource_MISC

Source: cverecord

https://github.com/cakephp/cakephp/commit/3e09dae6cbdc983754fa3a8e6aae74da102a3ea1

x_refsource_MISC

Source: cverecord

https://github.com/cakephp/cakephp/commit/b67b622457362b075bb37e625a82af73a0b3c9c3

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.2HIGHGitHub_M

Vector?

Quick Info

StatusDEFERRED

CWE

CWE-93

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