---
id: CVE-2026-65604
title: >-
  Skipper contains an incomplete fix for CVE-2026-50197 in which oversized
  request bodies bypass Open Policy Agent (OPA) deny-on-presence Rego policies
summary: >-
  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 fu…
severity: high
cvss: 8.2
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N'
cwe:
  - CWE-20
vendor: zalando
product: skipper
affected:
  - skipper (all versions)
published: '2026-07-23'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T16:17:29.370'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-65604'
references:
  - url: 'https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734'
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/skipper-incomplete-fix-for-cve-2026-50197-policy-bypass
    label: disclosure@vulncheck.com
  - url: 'https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734'
    label: 134c704f-9b21-4f2e-91b3-4a467353bcc0
tags:
  - nvd
  - cve.org
  - exploit-available
exploitAvailable: true
ssvc:
  exploitation: poc
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-07-24T14:03:58.021319Z'
epss: 0.0039
epssPercentile: 0.3101
ingestedAt: '2026-10-08T16:52:14.708Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.