CakePHP through 5.4.3 Email Header Injection via Bare CR/LF in SmtpTransport and MailTransport

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-119417
StatePUBLISHED
AssignerVulnCheck
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-10-30 12:16:38 UTC
Updated2026-10-30 19:07:25 UTC
DescriptionCakePHP 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.

Risk And Classification

Primary CVSS: v4.0 6.3 MEDIUM from [email protected]

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Problem Types: CWE-93 | CWE-93 Improper Neutralization of CRLF Sequences ('CRLF Injection')

VersionSourceTypeScoreSeverityVector
4.0[email protected]Secondary6.3MEDIUMCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N/E:X/C...
4.0CNACVSS6.3MEDIUMCVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N
3.1[email protected]Secondary3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N
3.1CNACVSS3.7LOWCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

CVSS v4.0 Breakdown

Attack Vector
Network
Attack Complexity
High
Attack Requirements
Present
Privileges Required
None
User Interaction
None
Confidentiality
None
Integrity
Low
Availability
None
Sub Conf.
None
Sub Integrity
None
Sub Availability
None

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
Low
Availability
None

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Cakephp Cakephp affected 4.5.12 4.5.12 semver Not specified
CNA Cakephp Cakephp affected 4.6.5 4.6.5 semver Not specified
CNA Cakephp Cakephp affected 5.1.8 5.1.10 semver Not specified
CNA Cakephp Cakephp affected 5.2.14 5.2.15 semver Not specified
CNA Cakephp Cakephp affected 5.3.7 5.3.7 semver Not specified
CNA Cakephp Cakephp affected 5.4.0 5.4.3 semver Not specified

References

ReferenceSourceLinkTags
github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91... [email protected] github.com
github.com/cakephp/cakephp/commit/773587406a29eedc2e0031e12683b08e112cc538 [email protected] github.com
github.com/cakephp/cakephp/commit/e5936b286cc389b1497fd9b675a2133ba9ac557d [email protected] github.com
abraxaslabs.tech/research/cakephp-smtp-crlf [email protected] abraxaslabs.tech
github.com/cakephp/cakephp/pull/19695 [email protected] github.com
github.com/cakephp/cakephp [email protected] github.com
github.com/cakephp/cakephp/blob/6f3dd91371ac0698b64024ddb21d57def9fbba91... [email protected] github.com
github.com/cakephp/cakephp/commit/3b997318539c48a423b77651c61c9f229cbf9e33 [email protected] github.com
www.vulncheck.com/advisories/cakephp-through-5.4.3-email-header-injection-via-b... [email protected] www.vulncheck.com
github.com/cakephp/cakephp/commit/2b9326ca3f17b2e940c6c9f50d821e9929c00f39 [email protected] github.com
github.com/cakephp/cakephp/security/advisories/GHSA-2qh5-382h-3jpc [email protected] github.com
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Abraxas Labs (en)

CNA: Mark Story (en)

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