EUVD-2026-63999
GHSA-vh5m-r6vp-rxjg
Severity by source
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/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
Network-accessible endpoint requires only low-privilege authentication; scope changes because the server reaches internal systems beyond the attacker's access; no availability impact described.
Primary rating from Vendor (vulncheck).
CVSS VectorVendor: vulncheck
CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:L/VA:N/SC:H/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
Lifecycle Timeline
4DescriptionCVE.org
OpenViking before 0.3.4 contains a server-side request forgery vulnerability that allows authenticated low-privilege attackers to access internal network services by submitting arbitrary URLs to the resources API endpoint. Attackers can POST a crafted URL to /api/v1/resources, causing the server to issue outbound HEAD and GET requests with redirects enabled to loopback, RFC 1918, link-local, or cloud metadata addresses, then read back responses through normal content APIs to enumerate and interact with internal services.
AnalysisAI
Server-side request forgery in OpenViking before 0.3.4 allows authenticated low-privilege users to pivot the application server into an internal network proxy, reaching loopback addresses, RFC 1918 private ranges, link-local addresses, and cloud metadata endpoints such as AWS IMDS. By POSTing crafted URLs to /api/v1/resources, the attacker causes the server to issue outbound HEAD and GET requests with redirect-following enabled, then retrieves the responses through the normal content APIs - effectively mapping and interacting with internal services invisible from the public network. …
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Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires a valid low-privilege account on the OpenViking instance (PR:L per CVSS 4.0 vector). … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 4.0 score of 8.3 appropriately reflects AV:N/AC:L/AT:N/PR:L with high confidentiality impact on both the vulnerable system (VC:H) and subsequent systems (SC:H), the latter capturing cloud metadata and internal service exposure. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | Full exploit scenario with step-by-step reproduction available after sign-in. |
| Remediation | Upgrade to OpenViking 0.3.4, available at https://github.com/volcengine/OpenViking/releases/tag/v0.3.4. … Detailed patch versions, workarounds, and compensating controls in full report. |
Recommended ActionAI
Within 24 hours: enumerate all systems running OpenViking and confirm installed versions; assess whether any publicly exposed instances accept user authentication. …
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Same weakness CWE-918 – Server-Side Request Forgery (SSRF)
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External POC / Exploit Code
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