---
title: "CVE-2026-86043: Skipper - Authorization Bypass"
description: "Skipper < 0.27.37 contains an authorization bypass caused by incorrect handling of truncated request bodies in opaAuthorizeRequestWithBody filter, letting attackers bypass body inspection and authorize oversized requests, exploit requires crafted HTTP requests with chunked or HTTP/2 transfer encoding."
url: https://panop.io/threat-heartbeat/CVE-2026-86043/
---

# CVE-2026-86043 Skipper - Authorization Bypass

Skipper < 0.27.37 contains an authorization bypass caused by incorrect handling of truncated request bodies in opaAuthorizeRequestWithBody filter, letting attackers bypass body inspection and authorize oversized requests, exploit requires crafted HTTP requests with chunked or HTTP/2 transfer encoding.

CVSS base score 7.5 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Not required

EPSS

0.45% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86043)

## Details

Type

Authorization Bypass

Impact

Broken Access Control

CVSS vector

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

Published

16 September 2026

Updated

15 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Upgrade to version 0.27.37 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-2026-86043](https://nvd.nist.gov/vuln/detail/CVE-2026-86043)
- [https://github.com/zalando/skipper/tree/v0.27.35](https://github.com/zalando/skipper/tree/v0.27.35)
- [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-5gpm-rgj3-9q76](https://github.com/zalando/skipper/security/advisories/GHSA-5gpm-rgj3-9q76)

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## 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

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