# CVE-2026-56771: NewsBlur < 14.5.0 - Server-Side Request Forgery via add_url Endpoint

> Authenticated users can exploit an SSRF flaw in NewsBlur to access internal networks and cloud metadata, leading to sensitive data exfiltration.

- **Severity:** Medium 6.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:N/SC:H/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:** 25 Jun 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-hggv-jxwf-w664

## What is CVE-2026-56771?

CVE-2026-56771 is a medium-severity server-side request forgery vulnerability in samuelclay NewsBlur, published on 25 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

NewsBlur before version 14.5.0 contains a server-side request forgery vulnerability in the add_url endpoint that allows authenticated users to make arbitrary server requests to internal networks by failing to filter private IP addresses. Attackers can exploit this to access localhost services and cloud metadata endpoints, enabling internal network scanning and sensitive data exfiltration.

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

## Which versions are affected by CVE-2026-56771?


## How do I fix CVE-2026-56771?

No fix has been published for CVE-2026-56771 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56771 being exploited?

There is no known exploitation of CVE-2026-56771 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56771 and fix it if it is affected.

What it is: CVE-2026-56771 is a medium-severity server-side request forgery vulnerability in samuelclay NewsBlur, published on 25 Jun 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-2026-56771 in the wild and no public exploit code.

Affected product: samuelclay NewsBlur. 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-2026-56771/ (Markdown: https://insights.sbomify.com/CVE-2026-56771/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56771
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56771
- OSV: https://osv.dev/vulnerability/CVE-2026-56771

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56771/
Summaries are generated and may contain mistakes; the official description above is the record.