---
title: "CVE-2026-50887: shlink has a Server-Side Request Forgery issue"
url: https://erroneo.us/security/cve/CVE-2026-50887/
description: "CVE-2026-50887 (shlinkio/shlink (Composer (PHP))): A Server-Side Request Forgery (SSRF) in the automatic short URL title resolution component of shlink…"
type: vulnerability-record
section: "Security Digest"
date_published: 2026-06-15
date_modified: 2026-08-27
publisher: erroneo.us
author: erroneo.us Security Desk
cve: "CVE-2026-50887"
kev: false
cvss: 9.1
epss: 0.00404
license: All rights reserved. Quote with attribution and a link.
---

# CVE-2026-50887: shlink has a Server-Side Request Forgery issue

**Signal:** Critical and remotely reachable. No known exploitation yet, but it is network-reachable without credentials. (Computed from CISA KEV, EPSS and CVSS; not an editorial verdict.)

## Should you act?

- Not in CISA KEV , but CISA’s SSVC assessment records a public proof-of-concept, so attack code exists.
- EPSS 0.4% , percentile 34: FIRST’s model estimates a 0.4% chance of exploitation activity in the next 30 days, higher than 34% of all scored CVEs (low). EPSS is a probability, not a verdict.
- Remotely reachable with no login and no user interaction. If the vulnerable service is exposed to the internet, prioritize it.
- Only applies if your dependency tree includes shlinkio/shlink (Composer (PHP)) <= 5.0.1, no fixed version listed . Check your lockfile, including transitive dependencies.

## What it is

A Server-Side Request Forgery (SSRF) in the automatic short URL title resolution component of shlink v5.0.1 allows attackers to scan internal resources via supplying a crafted longUrl.

## Affected packages

- Composer (PHP) `shlinkio/shlink` <= 5.0.1 → fixed: none listed

## Affected products (CVE record)

- n/a n/a: see advisory

## Severity

- CISA-ADP CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`
- GitHub CVSS 3.1: 9.1 `CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N`

## Exploitation

- CISA KEV: not listed (no confirmed in-the-wild exploitation known to CISA).
- CISA SSVC assessment: exploitation poc , automatable yes , technical impact total .
- FIRST EPSS (model of 2026-10-21): 0.40% probability of exploitation activity in the next 30 days; percentile 34.

## Sources

- [GitHub Advisory GHSA-p85r-x2wj-mxqj](https://github.com/advisories/GHSA-p85r-x2wj-mxqj)
- [CVE.org record CVE-2026-50887](https://www.cve.org/CVERecord?id=CVE-2026-50887)
- [NVD entry CVE-2026-50887](https://nvd.nist.gov/vuln/detail/CVE-2026-50887)
- [gist.github.com](https://gist.github.com/pyuysig/9de95fb39eb089a4346570d791af99a6)

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Source page: https://erroneo.us/security/cve/CVE-2026-50887/ · Security Digest: https://erroneo.us/security/ · More: https://erroneo.us/llms.txt