CVE-2026-18736

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Source
https://cve.org/CVERecord?id=CVE-2026-18736
Import Source
https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18736.json
JSON Data
https://api.osv.dev/v1/vulns/CVE-2026-18736
Published
2026-08-03T20:15:22.814Z
Modified
2026-08-06T03:31:06.692094999Z
Severity
  • 5.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N CVSS Calculator
Summary
Shlink Server-Side Request Forgery via Short URL Title Auto-Resolution
Details

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.

Database specific 
{
    "cwe_ids": [
        "CWE-918"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/18xxx/CVE-2026-18736.json",
    "cna_assigner": "VulnCheck"
}
References

Affected packages

Git / github.com/shlinkio/shlink

Affected ranges

Type
GIT
Repo
https://github.com/shlinkio/shlink
Events
Introduced
3d99fc17081aa43463e715cf1e180abf47e12fb4
Last affected
c201760cccb84c61f70d16baca26e1e548eb1157
Database specific 
{
    "extracted_events": [
        {
            "introduced": "2.6.0"
        },
        {
            "last_affected": "5.1.5"
        }
    ],
    "source": "AFFECTED_FIELD"
}

Affected versions

v2.*
v2.10.0
v2.10.1
v2.10.2
v2.10.3
v2.6.0
v2.6.1
v2.6.2
v2.7.0
v2.7.1
v2.7.2
v2.7.3
v2.8.0
v2.8.1
v2.9.0
v2.9.1
v2.9.2
v2.9.3
v3.*
v3.0.0
v3.0.1
v3.0.2
v3.0.3
v3.1.0
v3.1.1
v3.1.2
v3.2.0
v3.2.1
v3.3.0
v3.3.1
v3.3.2
v3.4.0
v3.5.0
v3.5.1
v3.5.2
v3.5.3
v3.5.4
v3.6.0
v3.6.1
v3.6.2
v3.6.3
v3.6.4
v3.7.0
v3.7.1
v3.7.2
v3.7.3
v4.*
v4.0.0
v4.0.1
v4.0.2
v4.0.3
v4.1.0
v4.1.1
v4.2.0
v4.2.1
v4.2.2
v4.2.3
v4.2.4
v4.2.5
v4.3.0
v4.3.1
v4.4.0
v4.4.1
v4.4.2
v4.4.3
v4.4.4
v4.4.5
v4.4.6
v4.5.0
v4.5.1
v4.5.2
v4.5.3
v4.6.0
v5.*
v5.0.0
v5.0.1
v5.0.2
v5.1.0
v5.1.1
v5.1.2
v5.1.3
v5.1.4
v5.1.5

Database specific

source 
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-18736.json"