Vulnerability DatabaseCVE-2026-86539
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CVE-2026-86539
Published:September 07, 2026
Updated:September 22, 2026
knowns through 0.33.0 contains a server-side request forgery vulnerability in the POST /api/embedding-models/test endpoint that issues outbound requests to caller-supplied destinations without validation. Attackers can enumerate internal hosts and cloud metadata endpoints by observing transport error messages that reveal network reachability information.
Related Resources (6)
https://www.vulncheck.com/advisories/knowns-through-0.33.0-server-side-request-forgery-via-embedding-models-endpoint
https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/server/routes/imports.go#L317-L330
https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/86xxx/CVE-2026-86539.json
https://nvd.nist.gov/vuln/detail/CVE-2026-86539
https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/server/routes/embedding_models.go#L64-L110
https://github.com/knowns-dev/knowns/security/advisories/GHSA-qx9v-m9gg-p5jg
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CVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
LOW
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
Server-Side Request Forgery (SSRF)
CWE-918
EPSS
Base Score:
0.21