CVE-2026-109318 Grav Git Sync 1.0.2 through 3.4.12 Command Injection via Commit Author
Authenticated content editors can execute OS commands via shell injection in commit author fields when specific author modes are enabled.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-109318?
CVE-2026-109318 is a high-severity command injection vulnerability in trilbymedia grav-plugin-git-sync, published on 12 Oct 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-78
Which versions are affected by CVE-2026-109318?
How do I fix CVE-2026-109318?
No fix has been published for CVE-2026-109318 yet. Limit exposure of the affected software until one is available.
Upgrade, and pass arguments to programs as a list instead of through a shell. More about Command injection.
Is CVE-2026-109318 being exploited?
There is no known exploitation of CVE-2026-109318 in the wild and no public exploit code.
Sources
Also known as GHSA-c89w-55m3-fmf7, GHSA-cp28-795p-j89g.