CVE-2026-50887 json
shlink has a Server-Side Request Forgery issue
published 2026-06-15 4 mo ago modified 2026-08-27 2 mo ago also GHSA-p85r-x2wj-mxqj , EUVD-2026-36785
- cvss
- 9.1
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
CISA SSVC
- Exploitation
- Proof of concept is public
- Automatable
- yes
- Technical impact
- total
- Assessed
- 4 mo ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
Exploits and checks
- gist.github.com https://gist.github.com/pyuysig/9de95fb39eb089a4346570d791af99a6 referenced PoC, tagged "exploit" by a source, unverified
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CISA ADP | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| CNA | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
| GitHub | 3.1 | 9.1 | CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected packages
| ecosystem | package | affected | fixed in |
|---|---|---|---|
| packagist | shlinkio/shlink | <=5.0.1 |
no fix listed |
Classification
- Weakness
-
- CWE-918 Server-Side Request Forgery
References
-
gist.github.com
/pyuysig/9de95fb39eb089a4346570d791af99a6
exploit, web
-
nvd.nist.gov
/vuln/detail/CVE-2026-50887
advisory
-
github.com
/shlinkio/shlink
package
Sources
- CVE List CVE-2026-50887
- GitHub Advisory GHSA-p85r-x2wj-mxqj
- NVD CVE-2026-50887
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.