High [CVE-2026-84199] Information Disclosure via Server-Side Request Forgery in APICall Feature
This high-severity Red Hat Linux advisory covers CVE-2026-84199.
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Summary
A flaw was found in Kyverno. A Server-Side Request Forgery (SSRF) vulnerability exists in the APICall feature due to improper validation of the URL field in a Policy's ServiceCall configuration.
A user with namespace-level Policy creation permissions can exploit this to direct Kyverno to make HTTP requests to arbitrary internal resources. This allows the attacker to access sensitive information, such as cloud metadata endpoints or other tenants' secrets and cloud IAM credentials, breaking multi-tenant isolation.
Important: Kyverno in Konflux is vulnerable to information disclosure via Server-Side Request Forgery. Red Hat severity: Important — CVSS 7.7 (CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:N/A:N).
Weakness: CWE-918.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative — check it before change work.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Fixed versions
No fixed release is recorded yet. That does not prove no patch exists — confirm against the vendor advisory.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
Mitigation checklist
- Exploitation of this flaw requires the ability to create or modify Kyverno Policy, ClusterPolicy, or GlobalContextEntry resources. The primary mitigation is to remove policy-authoring permissions from untrusted and namespace-scoped users: restrict create, update, and patch on policies.kyverno.io, clusterpolicies.kyverno.io, and globalcontextentries.kyverno.io to cluster administrators, and audit any Role or ClusterRole that grants these verbs to tenant service accounts.
Official advisory · high-confidence parse· fetched 1 hour ago·verify at source
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