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6 vulnerabilities by shlinkio
CVE-2026-18738 (GCVE-0-2026-18738)
Vulnerability from nvd – Published: 2026-08-03 20:53 – Updated: 2026-08-04 15:05
VLAI
EPSS
VEX
Title
Shlink CSV Formula Injection via Visit Export CLI
Summary
Shlink versions 5.0.0 through 5.1.5 contain a CSV formula injection vulnerability that allows unauthenticated remote attackers to plant spreadsheet formulas into exported visit data by supplying malicious values in User-Agent, Referer, or request path headers beginning with formula-triggering characters such as =, +, -, or @. Attackers can craft a single unauthenticated request against any short URL to embed DDE or WEBSERVICE formula payloads into CSV cells, which are then executed on an administrator's client machine when the exported CSV file is opened in a spreadsheet application that evaluates formulas.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:28 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/CSV-formula-injection… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-csv-f… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-18737 (GCVE-0-2026-18737)
Vulnerability from nvd – Published: 2026-08-03 20:40 – Updated: 2026-08-05 14:22
VLAI
EPSS
VEX
Title
Shlink Blind SQL Injection via tags/stats orderBy Parameter
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:22 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/SQL-injection-in-GET-… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-blind… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-18736 (GCVE-0-2026-18736)
Vulnerability from nvd – Published: 2026-08-03 20:15 – Updated: 2026-08-04 13:45
VLAI
EPSS
VEX
Title
Shlink Server-Side Request Forgery via Short URL Title Auto-Resolution
Summary
Shlink contains a server-side request forgery vulnerability that allows authenticated API key holders to cause the server to issue arbitrary HTTP GET requests by supplying a crafted long URL during short URL creation with title auto-resolution enabled. Attackers can submit URLs pointing to public hosts that redirect to internal targets, including loopback addresses, link-local ranges, and cloud metadata endpoints such as 169.254.169.254, to exfiltrate internal service information via the HTML title element returned in the short URL creation response.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 13:44 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/Server-side-request-f… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-serve… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-18738 (GCVE-0-2026-18738)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:53 – Updated: 2026-08-04 15:05
VLAI
EPSS
VEX
Title
Shlink CSV Formula Injection via Visit Export CLI
Summary
Shlink versions 5.0.0 through 5.1.5 contain a CSV formula injection vulnerability that allows unauthenticated remote attackers to plant spreadsheet formulas into exported visit data by supplying malicious values in User-Agent, Referer, or request path headers beginning with formula-triggering characters such as =, +, -, or @. Attackers can craft a single unauthenticated request against any short URL to embed DDE or WEBSERVICE formula payloads into CSV cells, which are then executed on an administrator's client machine when the exported CSV file is opened in a spreadsheet application that evaluates formulas.
Severity
4.7 (Medium)
SSVC
Exploitation: none
Automatable: yes
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 14:28 UTC
CWE
- CWE-1236 - Improper Neutralization of Formula Elements in a CSV File
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/CSV-formula-injection… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-csv-f… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-18737 (GCVE-0-2026-18737)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:40 – Updated: 2026-08-05 14:22
VLAI
EPSS
VEX
Title
Shlink Blind SQL Injection via tags/stats orderBy Parameter
Summary
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.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-05 14:22 UTC
CWE
- CWE-89 - Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/SQL-injection-in-GET-… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-blind… | third-party-advisory |
Date Public
2026-08-03 00:00
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CVE-2026-18736 (GCVE-0-2026-18736)
Vulnerability from cvelistv5 – Published: 2026-08-03 20:15 – Updated: 2026-08-04 13:45
VLAI
EPSS
VEX
Title
Shlink Server-Side Request Forgery via Short URL Title Auto-Resolution
Summary
Shlink contains a server-side request forgery vulnerability that allows authenticated API key holders to cause the server to issue arbitrary HTTP GET requests by supplying a crafted long URL during short URL creation with title auto-resolution enabled. Attackers can submit URLs pointing to public hosts that redirect to internal targets, including loopback addresses, link-local ranges, and cloud metadata endpoints such as 169.254.169.254, to exfiltrate internal service information via the HTML title element returned in the short URL creation response.
Severity
SSVC
Exploitation: poc
Automatable: no
Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-08-04 13:44 UTC
CWE
- CWE-918 - Server-Side Request Forgery (SSRF)
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://github.com/theopaid/Server-side-request-f… | vendor-advisory |
| https://github.com/shlinkio/shlink | product |
| https://www.vulncheck.com/advisories/shlink-serve… | third-party-advisory |
Date Public
2026-08-03 00:00
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