# CVE-2026-44313: LinkWarden: Server-Side Request Forgery (SSRF) in Link Creation via fetchTitleAndHeaders Function

> Authenticated users can exploit insufficient URL validation to perform Server-Side Request Forgery against internal services.

- **Severity:** Critical 9.1 (`CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:L`)
- **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:** 8 May 2026
- **Updated:** 11 May 2026
- **Also known as:** GHSA-5qpc-x7rv-hvmp

## What is CVE-2026-44313?

CVE-2026-44313 is a critical server-side request forgery vulnerability in linkwarden, published on 8 May 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

Linkwarden is a self-hosted, open-source collaborative bookmark manager to collect, organize and archive webpages. Prior to version 2.13.0, a Server-Side Request Forgery (SSRF) vulnerability in the fetchTitleAndHeaders function allows authenticated users to make arbitrary HTTP requests to internal services due to insufficient URL validation that only checks for "http://" or "https://" prefixes. This issue has been patched in version 2.13.0.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-44313?


## How do I fix CVE-2026-44313?

No fix has been published for CVE-2026-44313 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-44313 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-44313 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-44313 and fix it if it is affected.

What it is: CVE-2026-44313 is a critical server-side request forgery vulnerability in linkwarden, published on 8 May 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-2026-44313 exists.

Affected product: linkwarden. 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-2026-44313/ (Markdown: https://insights.sbomify.com/CVE-2026-44313/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-44313
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-44313
- OSV: https://osv.dev/vulnerability/CVE-2026-44313

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-44313/
Summaries are generated and may contain mistakes; the official description above is the record.