PatchSiren cyber security CVE debrief
CVE-2026-67434 PHPCSStandards CVE debrief
The CVE-2026-67434 vulnerability is a command injection issue in PHP_CodeSniffer, a tool used to detect coding standard violations in PHP files. This vulnerability affects PHP_CodeSniffer versions prior to 3.13.6 and 4.0.2. The issue arises when the tool generates reports in Gitblame, Hgblame, or Svnblame formats and processes a file with shell metacharacters in its name, potentially allowing attackers to execute shell commands. The vulnerability is particularly concerning in environments where PHP_CodeSniffer is used in continuous integration pipelines or for reviewing third-party code. Users of PHP_CodeSniffer should be aware of this vulnerability and take steps to mitigate it, such as updating to the latest versions (3.13.6 or 4.0.2) and reviewing their usage of the tool, especially in continuous integration pipelines or when reviewing third-party code. Additionally, users should verify their PHP_CodeSniffer installations and configurations to assess potential exposure and implement compensating controls to restrict file system access if necessary.
- Vendor
- PHPCSStandards
- Product
- PHP_CodeSniffer
- CVSS
- HIGH 7.3
- CISA KEV
- Not listed in stored evidence
- Original CVE published
- 2026-08-06
- Original CVE updated
- 2026-08-07
- Advisory published
- 2026-08-06
- Advisory updated
- 2026-08-07
Who should care
Users of PHP_CodeSniffer, especially those using continuous integration pipelines or reviewing third-party code, should be aware of this vulnerability and take steps to mitigate it. This includes developers, security teams, and operators who work with PHP_CodeSniffer or manage environments where it is used. Additionally, anyone responsible for the security of PHP_CodeSniffer installations or configurations should prioritize addressing this vulnerability.
Technical summary
PHP_CodeSniffer contains a command injection vulnerability in the code that generates the Gitblame, Hgblame, and Svnblame report formats. Running PHP_CodeSniffer over untrusted files could result in attacker-controlled shell commands being executed when processing a file with shell metacharacters in its name. This vulnerability affects users running PHP_CodeSniffer versions prior to 3.13.6 and 4.0.2. The vulnerability is particularly concerning in continuous integration pipelines or when reviewing third-party code.
Defensive priority
High-priority defensive review recommended due to command injection vulnerability in PHP_CodeSniffer.
Recommended defensive actions
- Review PHP_CodeSniffer usage in continuous integration pipelines and developer environments.
- Update PHP_CodeSniffer to version 3.13.6 or 4.0.2.
- Inventory PHP_CodeSniffer installations for potential exposure.
- Monitor PHP_CodeSniffer logs for suspicious activity.
- Implement compensating controls to restrict file system access.
- Conduct a thorough review of PHP_CodeSniffer configurations and usage in your environment.
- Verify that your continuous integration and deployment processes are not vulnerable to this exploit.
Evidence notes
Evidence from official CVE and NVD sources indicates a command injection vulnerability in PHP_CodeSniffer versions prior to 3.13.6 and 4.0.2. Limited detail on exploitability and affected systems. The vulnerability is triggered when PHP_CodeSniffer processes a file with shell metacharacters in its name, potentially leading to attacker-controlled shell commands being executed. Users should verify their PHP_CodeSniffer installations and configurations to assess potential exposure.
Official resources
AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-08-06T22:18:21.750Z and has not been modified since then.