CVE-2026-18737

MEDIUM 6.5

Shlink Blind SQL Injection via tags/stats orderBy Parameter

CVSS Score

6.5

EPSS Score

0.0%

EPSS Percentile

0th

Shlink contains a blind SQL injection vulnerability that allows any authenticated API key holder to inject arbitrary SQL fragments by supplying an unvalidated direction value in the orderBy query parameter of the tag statistics endpoint. Attackers can craft a malicious direction string containing SQL subqueries that flows unsanitized into a Doctrine QueryBuilder ORDER BY clause, enabling time-based, boolean-oracle, and error-based extraction of sensitive data including long URLs, visitor records, IP addresses, geolocation data, user agents, and hashed API key secrets from any tenant.

CWE	CWE-89
Vendor	shlinkio
Product	shlink
Published	Aug 3, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Unchanged

Confidentiality

High

Integrity

None

Availability

None

Affected Versions

shlinkio / Shlink

3.3.1 ≤ 5.1.5

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/theopaid/SQL-injection-in-GET-rest-v-n-tags-stats-via-the-orderBy-parameter-shlink- github.com: https://github.com/shlinkio/shlink vulncheck.com: https://www.vulncheck.com/advisories/shlink-blind-sql-injection-via-tags-stats-orderby-parameter

Credits

Theodosis Paidakis