# CVE-2026-53654: Grav: Unauthenticated open redirect via login twofa_cancel _redirect

> Unauthenticated attackers can redirect users to malicious external sites via the Grav Login plugin's two-factor authentication cancellation task.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 19 Aug 2026
- **Updated:** 19 Aug 2026
- **Also known as:** GHSA-wwcc-xxhc-44j6

## What is CVE-2026-53654?

CVE-2026-53654 is a medium-severity vulnerability in getgrav grav, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Grav is a file-based Web platform. Prior to 3.8.5, the Login plugin twofa_cancel task accepts a client-controlled _redirect field without a nonce and allows an unauthenticated request to set an external http, https, or protocol-relative Location target. Controller::execute() applies the field when taskTwofa_cancel() sets no redirect, and Grav::getRedirectResponse() accepts the target through Uri::isExternal(), enabling phishing redirects from a trusted Grav host. This issue is fixed in version 3.8.5.

Weakness: CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-53654?


## How do I fix CVE-2026-53654?

No fix has been published for CVE-2026-53654 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-53654 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53654 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-53654 and fix it if it is affected.

What it is: CVE-2026-53654 is a medium-severity vulnerability in getgrav grav, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-53654 exists.

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-2026-53654/ (Markdown: https://insights.sbomify.com/CVE-2026-53654/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-53654
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-53654
- OSV: https://osv.dev/vulnerability/CVE-2026-53654

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-53654/
Summaries are generated and may contain mistakes; the official description above is the record.