Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Kyverno versions up to and including 1.17.1 are affected by a server-side request forgery flaw in apiCall URLs that use variable substitution. An authenticated user who can create resources matching a ClusterPolicy can cause the admission controller to send requests to arbitrary endpoints, including internal services and cloud metadata, and response data can be returned in admission error messages. The source gives no fixed version and no workaround.
Not analysed yet
We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.
Severity and exploitation
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 8.3 | High | 4.0 | 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 | CNA (VulnCheck) |
- CISA KEV Not listed.
- EPSS 0.0035, the 29th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:13 UTC First seen by agentprime
- 31 Oct 2026, 14:13 UTC Confirmed by OSV