# CVE-2026-85603: Grav Admin Plugin Path Traversal via Save As Language Code

> Authenticated admin users can exploit path traversal in the Save As action to write arbitrary markdown files outside the intended directory.

- **Severity:** High 7.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 4 Sep 2026
- **Updated:** 14 Sep 2026
- **Also known as:** GHSA-67xf-jwpx-5m9q

## What is CVE-2026-85603?

CVE-2026-85603 is a high-severity path traversal vulnerability in getgrav grav, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Grav versions before 1.10.55 contain a path traversal vulnerability in the admin plugin's Save As action that fails to validate the language code parameter. An authenticated admin user with admin.pages.create permission can supply directory traversal sequences in the lang POST field to write arbitrary .md files outside the pages directory with attacker-controlled content.

Weakness: CWE-73 (External Control of File Name or Path)

## Which versions are affected by CVE-2026-85603?


## How do I fix CVE-2026-85603?

No fix has been published for CVE-2026-85603 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-85603 being exploited?

There is no known exploitation of CVE-2026-85603 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-85603 and fix it if it is affected.

What it is: CVE-2026-85603 is a high-severity path traversal vulnerability in getgrav grav, published on 4 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-85603 in the wild and no public exploit code.

Affected product: getgrav grav. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-85603/ (Markdown: https://insights.sbomify.com/CVE-2026-85603/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-85603
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-85603
- OSV: https://osv.dev/vulnerability/CVE-2026-85603

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-85603/
Summaries are generated and may contain mistakes; the official description above is the record.