# CVE-2026-80204: Grav before 1.0.18 Authentication Bypass via Scoped API Key

> Attackers with scoped API keys can bypass permission checks to view or edit page security settings beyond their granted scope in Grav CMS.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 26 Aug 2026
- **Updated:** 26 Aug 2026
- **Also known as:** GHSA-c8f5-phgh-whxw

## What is CVE-2026-80204?

CVE-2026-80204 is a critical missing authorization vulnerability in getgrav grav, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

The Grav API plugin (getgrav/grav-plugin-api) before 1.0.18 does not apply the API-key scope cap in the injectSecurityTab() function of BlueprintController when deciding whether a page's security/permissions blueprint section is editable. Because the function performs raw isSuperAdmin()/hasPermission() checks without a request parameter, it cannot enforce scopeAllows(). A caller holding a scoped API key may therefore see (and potentially edit) page permission fields beyond the scope granted to the key. The end-to-end write-time impact was not fully confirmed by the reporter.

Weakness: CWE-863 (Incorrect Authorization)

## Which versions are affected by CVE-2026-80204?


## How do I fix CVE-2026-80204?

No fix has been published for CVE-2026-80204 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-80204 being exploited?

There is no known exploitation of CVE-2026-80204 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-80204 and fix it if it is affected.

What it is: CVE-2026-80204 is a critical missing authorization vulnerability in getgrav grav, published on 26 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-80204 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-2026-80204/ (Markdown: https://insights.sbomify.com/CVE-2026-80204/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-80204
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-80204
- OSV: https://osv.dev/vulnerability/CVE-2026-80204

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-80204/
Summaries are generated and may contain mistakes; the official description above is the record.