# CVE-2026-2376: Mirror-registry: quay: quay: server-side request forgery via open redirect vulnerability in web interface

> An authenticated user can exploit an open redirect to force the server to access internal or restricted systems, enabling server-side request forgery.

- **Severity:** Medium 4.9 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:L/I:L/A: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:** 12 Mar 2026
- **Updated:** 12 Mar 2026
- **Also known as:** GHSA-9w78-x9jw-9c7m

## What is CVE-2026-2376?

CVE-2026-2376 is a medium-severity server-side request forgery vulnerability in Red Hat Quay 3, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A flaw was found in mirror-registry where an authenticated user can trick the system into accessing unintended internal or restricted systems by providing malicious web addresses. 

When the application processes these addresses, it automatically follows redirects without verifying the final destination, allowing attackers to route requests to systems they should not have access to.

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

## Which versions are affected by CVE-2026-2376?

It affects 2 products.


Products: Redhat Mirror Registry, Redhat Quay.

## How do I fix CVE-2026-2376?

No fix has been published for CVE-2026-2376 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-2376 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2376 exists.

## Other vulnerabilities in Red Hat Quay 3

- [CVE-2024-3622](https://insights.sbomify.com/CVE-2024-3622/): Mirror-registry: plain-text default csrf secret key (high 8.8)
- [CVE-2024-3623](https://insights.sbomify.com/CVE-2024-3623/): Mirror-registry: default database secret key stored in plain-text on initial configuration file (medium 6.5)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-2376 and fix it if it is affected.

What it is: CVE-2026-2376 is a medium-severity server-side request forgery vulnerability in Red Hat Quay 3, published on 12 Mar 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-2376 exists.

Affected product: Red Hat Quay 3. 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-2026-2376/ (Markdown: https://insights.sbomify.com/CVE-2026-2376/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-2376
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-2376
- OSV: https://osv.dev/vulnerability/CVE-2026-2376

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-2376/
Summaries are generated and may contain mistakes; the official description above is the record.