CVE-2026-109318: Grav Git Sync 1.0.2 through 3.4.12 Command Injection via Commit Author

Severity: high (CVSS 8.8 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 1.2% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-10-12 · updated 2026-10-15
Weakness: CWE-78

Description

Grav Git Sync 1.0.2 through 3.4.12 contains a command injection vulnerability that allows authenticated content editors to execute OS commands by injecting shell substitutions into profile fields. When the gravuser or gravfull author mode is enabled, attackers can set a malicious username, full name, or email that reaches PHP exec() via git commit --author, running commands as the web-server account.

Affected products

trilbymedia grav-plugin-git-sync: from 1.0.2 before 3.4.13 — fixed in 3.4.13

How to fix

Upgrade to a fixed version: trilbymedia grav-plugin-git-sync 3.4.13. Check the vendor advisory for mitigations.

References

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