CVE-2026-65604CWE-20

CVE-2026-65604

High · published July 24, 2026

CVSS v3.1

8.2

EPSS

Percentile

32.0

In the wild

Unconfirmed

What it is

Skipper contains an incomplete fix for CVE-2026-50197 in which oversized request bodies bypass Open Policy Agent (OPA) deny-on-presence Rego policies. When a request body exceeds the configured maxBodyBytes limit, Skipper forwards the full payload to the upstream service while OPA evaluates against an empty parsed_body, so policies that deny requests based on body content are not enforced and forbidden actions proceed. No fixed version is available; v0.27.26 adds documentation guidance only.

The record

Technical detail

CVSS v3.1: 8.2 · HIGH
Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N
CVSS v4.0: Not supplied
EPSS: 0.00390 · 32.0th percentile
Weakness: CWE-20 · Improper Input Validation
Published: 2026-07-24T02:16Z

References (3)

https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734 · [email protected]https://www.vulncheck.com/advisories/skipper-incomplete-fix-for-cve-2026-50197-policy-bypass · [email protected]https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734 · 134c704f-9b21-4f2e-91b3-4a467353bcc0

EPSS history

Timeline

23 JUL 21:16Z
Skipper Incomplete Fix for CVE-2026-50197 Policy Bypass
cvelistv5