PT-2026-67504 · Shlinkio · Shlink

Theodosis Paidakis · CVE-2026-18737 · Published 2026-08-03 · Updated 2026-08-03

Mitre

CVSS v3.1

6.5

Medium

Base vector

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

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.

Fix

SQL injection

Weakness Enumeration

CWE-89

Related Identifiers

CVE-2026-18737

Affected Products

Shlink

References · 4

• https://nvd.nist.gov/vuln/detail/CVE-2026-18737 · Security Note
• https://github.com/theopaid/SQL-injection-in-GET-rest-v-n-tags-stats-via-the-orderBy-parameter-shlink- · Vendor Advisory
• https://github.com/shlinkio/shlink · Note
• https://vulncheck.com/advisories/shlink-blind-sql-injection-via-tags-stats-orderby-parameter · Note