CVE-2026-18737
Last modified
CVE-2026-18737 is a high-severity vulnerability rated 7.1/10 on the CVSS scale. 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.. EPSS estimates a 0.24% chance of exploitation in the next 30 days.
Description
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.
Metrics
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
Weakness Enumeration
Affected Software
Source: CNA advisory (CVE.org). NVD analysis pending.
| Vendor | Product | Versions |
|---|---|---|
| shlinkio | Shlink | >= 3.3.1, <= 5.1.5 |
References
Timeline
- Published
- Last Modified
- Status
- Received
Frequently Asked Questions
What is CVE-2026-18737?
How severe is CVE-2026-18737?
How do I fix CVE-2026-18737?
How Strix Helps
- How Strix found a critical auth bypass in etcdStrix autonomously discovered a critical authentication bypass in etcd, later designated CVE-2026-33413.
- Autonomous PentestingAI agents that find and validate exploitable vulnerabilities like this one across your applications.
- PR ReviewsPentest every pull request so vulnerable code is caught before it ships to production.
- AI Penetration TestingHow AI-driven penetration testing continuously covers your attack surface.
Related CVEs from 2026
- CVE-2026-18720A flaw has been found in kalcaddle kodbox 1.67 Build 02. Thi…5.5
- CVE-2026-18721A vulnerability has been found in kalcaddle kodbox 1.67 Buil…4.3
- CVE-2026-18722A vulnerability was found in diaowen DWSurvey up to 6.14.0. …6.3
- CVE-2026-18723A vulnerability was determined in diaowen DWSurvey up to 6.1…6.3
- CVE-2026-18733A prompt injection vulnerability in the shell tool in Amazon…8.8
- CVE-2026-18736Shlink contains a server-side request forgery vulnerability …5.3
- CVE-2026-18738Shlink versions 5.0.0 through 5.1.5 contain a CSV formula in…4.7
- CVE-2026-18739A flaw was found in popt, a command-line option parsing libr…2.5
- CVE-2026-1874Always-Incorrect Control Flow Implementation vulnerability i…7.5
- CVE-2026-1875Improper Resource Shutdown or Release vulnerability in Mitsu…7.5
- CVE-2026-18753The product firmware contains an embedded, static RSA privat…9.1
- CVE-2026-18754The product firmware contains an embedded, static RSA privat…9.1
Are you affected by CVE-2026-18737?
Run a free Strix scan to check your systems for this vulnerability.
Scan your code nowSource: NVD / NIST