CVE-2026-119417
CakePHP through 5.4.3 Email Header Injection via Bare CR/LF in SmtpTransport and MailTransport
- State
- Published
- Severity
- 6.3 Medium
- Published
- Oct 30, 2026
- Updated
- Oct 30, 2026
- Reserved
- Oct 30, 2026
Description
CakePHP 4.5.12, 4.6.5, 5.1.8 through 5.1.10, 5.2.14 through 5.2.15, 5.3.7, and 5.4.0 through 5.4.3 contain an email header injection vulnerability because SmtpTransport and MailTransport strip only CRLF pairs from header values, an incomplete fix for CVE-2026-77634. Attackers controlling custom headers set via Message::setHeaders() or Message::addHeaders() can insert a bare CR or LF to inject headers like Bcc, redirecting or altering outgoing mail.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 6.3 Medium | CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 3.7 Low | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N | VulnCheck |
Weaknesses
- CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')
Affected Products
| Product | Versions |
|---|---|
cakephpcakephp |
|
References
- https://github.com/cakephp/cakephp/commit/2b9326ca3f17b2e940c6c9f50d821e9929c00f39patch
- https://github.com/cakephp/cakephp/commit/773587406a29eedc2e0031e12683b08e112cc538patch
- https://github.com/cakephp/cakephp/commit/3b997318539c48a423b77651c61c9f229cbf9e33patch
- https://github.com/cakephp/cakephp/commit/e5936b286cc389b1497fd9b675a2133ba9ac557dpatch
- https://github.com/cakephp/cakephp/pull/19695patchissue-tracking
- https://github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91/src/Mailer/Transport/SmtpTransport.php#L574technical-description
- https://github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91/src/Mailer/Transport/MailTransport.php#L57technical-description
- GitHub Security Advisory (GHSA-2qh5-382h-3jpc)relatedvendor-advisory
- https://abraxaslabs.tech/research/cakephp-smtp-crlfthird-party-advisory
- https://github.com/cakephp/cakephpproduct
- VulnCheck Advisory: CakePHP through 5.4.3 Email Header Injection via Bare CR/LF in SmtpTransport and MailTransportthird-party-advisory
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