---
title: "CVE-2026-65838: Skipper - Authorization Bypass"
description: "Skipper < 0.27.35 contains an authorization bypass caused by incomplete request body parsing in opaAuthorizeRequestWithBody filter, letting attackers bypass deny-on-presence Rego policies with oversized Content-Length requests, exploit requires policy logic that does not reject truncated bodies."
url: https://panop.io/threat-heartbeat/CVE-2026-65838/
---

# CVE-2026-65838 Skipper - Authorization Bypass

Skipper < 0.27.35 contains an authorization bypass caused by incomplete request body parsing in opaAuthorizeRequestWithBody filter, letting attackers bypass deny-on-presence Rego policies with oversized Content-Length requests, exploit requires policy logic that does not reject truncated bodies.

CVSS base score 8.2 /10

High

CISA KEV

Not listed

Public exploit

None known

EPSS

0.46% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-65838)

## Details

Type

Authorization Bypass

Impact

Broken Access Control

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N

Published

14 September 2026

Updated

15 October 2026

Weakness

[CWE-754](https://cwe.mitre.org/data/definitions/754.html)

## Vendor fix

Upgrade to version 0.27.35 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-65838](https://nvd.nist.gov/vuln/detail/CVE-2026-65838)
- [https://github.com/zalando/skipper/commit/2cfceabaa6ff0af65b312dcb9bcbe84691b9d507](https://github.com/zalando/skipper/commit/2cfceabaa6ff0af65b312dcb9bcbe84691b9d507)
- [https://github.com/zalando/skipper/releases/tag/v0.27.35](https://github.com/zalando/skipper/releases/tag/v0.27.35)
- [https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734](https://github.com/zalando/skipper/security/advisories/GHSA-8qqm-fp2q-v734)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)