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Vulnerability record · CVE-2026-84196 · published 1 September 2026

CVE-2026-84196: Server-side request forgery (SSRF) vulnerability

Kyverno before 1.18.0 contains a server-side request forgery vulnerability in apiCall.service.url that allows authenticated users to send arbitrary HTTP requests by injecting user-controlled input through variable substitution. Attackers can target internal services, cloud metadata endpoints, and loopback addresses, with response data reflected in admission error messages enabling non-blind data exfiltration.

8.3 CVSS 4.0 High EPSS 0.35% · top 73.5% CWE-918 · Server-side request forgery (SSRF) Awaiting Analysis
8.3CVSS 4.0 base score
0.35%EPSS exploitation probability, 30 days
NoNot in CISA KEV
0Affected product versions listed by NVD
2References
10 Sep 2026Last modified by NVD

Description

Kyverno before 1.18.0 contains a server-side request forgery vulnerability in apiCall.service.url that allows authenticated users to send arbitrary HTTP requests by injecting user-controlled input through variable substitution. Attackers can target internal services, cloud metadata endpoints, and loopback addresses, with response data reflected in admission error messages enabling non-blind data exfiltration.

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/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:

References

LinkTags
https://github.com/kyverno/kyverno/security/advisories/GHSA-qr4g-8hrp-c4rw
https://www.vulncheck.com/advisories/kyverno-before-1.18.0-server-side-request-forgery-via-apicall

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Source: NIST National Vulnerability Database (record CVE-2026-84196), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.