Server-Side Request Forgery Vulnerability in Kyverno by Nirmata
CVE-2026-100705

8.3HIGH

Key Information:

Vendor

Kyverno

Status
Kyverno
Vendor
CVE Published:
26 September 2026

What is CVE-2026-100705?

Kyverno versions prior to 1.19.1 have a vulnerability that exposes the system to server-side request forgery (SSRF). This issue arises because the egress blocklist and scoped-token controls are ineffective in the legacy apiCall service executor. Consequently, unauthorized users can trigger GET/POST requests to arbitrary hosts, including sensitive cloud metadata endpoints or internal services, allowing potential access to sensitive information such as cloud instance credentials. The vulnerability is particularly critical in scenarios where policy templates dictate the service URL from admission resources. The fixed version is 1.19.1.

Affected Version(s)

kyverno 0 < 1.19.1

kyverno 1.19.1

References

https://github.com/kyverno/kyverno/security/advisories/GH...
vendor-advisory
https://www.vulncheck.com/advisories/kyverno-before-1.19....
third-party-advisory

CVSS V4

Score:
8.3
Severity:
HIGH
Confidentiality:
High
Integrity:
Low
Availability:
None
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

ttzero25
.