Answer in brief
CVE-2026-77634 records a High severity (CVSS 8.2) vulnerability in CakePHP: SmtpTransport vulnerable to CRLF header injection. The current sources do not mark it as known exploited. The current feed maps cakephp/cakephp (composer), cakephp/cakephp (composer), cakephp/cakephp (composer), cakephp/cakephp (composer) and additional mapped packages. Check affected ranges and fixed versions before updating.
Analysis pending evidence review
HOL Guard separates source facts from reviewed analysis. See the methodology.
CVSS is 8.2. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.
Analysis status
Analysis pending evidence review
Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.
The current feed maps cakephp/cakephp (composer), cakephp/cakephp (composer), cakephp/cakephp (composer), cakephp/cakephp (composer) and additional mapped packages. Check affected ranges and fixed versions before updating.
| Package | Affected range | Fixed version |
|---|---|---|
| cakephp/cakephpcomposer | >=4.5.0,<4.5.12 | 4.5.12 |
| cakephp/cakephpcomposer | >=4.6.0,<4.6.5 | 4.6.5 |
| cakephp/cakephpcomposer | >=5.0.0,<5.1.8 | 5.1.9 |
| cakephp/cakephpcomposer | >=5.2.0,<5.2.14 | 5.2.14 |
| cakephp/cakephpcomposer | >=5.3.0,<5.3.7 | 5.3.7 |
| cakephp/cakephpgeneric | >= 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 | Not reported |
| cakephp/cakephppackagist | >=4.5.0 <4.5.12 | 4.5.12 |
| cakephp/cakephppackagist | >=5.0.0 <5.1.9 | 5.1.9 |
| cakephp/cakephppackagist | >=5.2.0 <5.2.14 | 5.2.14 |
| cakephp/cakephppackagist | >=5.3.0 <5.3.7 | 5.3.7 |
| cakephp/cakephppackagist | >=4.6.0 <4.6.5 | 4.6.5 |
Published upstream
Aug 24, 2026
Evidence: source:cvelist:source_dates:source-dates:recordSource modified
Sep 9, 2026
Evidence: source:cvelist:source_dates:source-dates:recordFirst seen by HOL
Aug 24, 2026
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.
Quoted source text, attributed separately from HOL analysis.