---
title: "CVE-2026-61682: kcp - Broken Access Control"
description: "kcp < 0.31.4 and < 0.32.2 contains a broken access control vulnerability caused by front-proxy not removing inbound identity headers, letting authenticated tenants impersonate identities and bypass authorization, exploit requires tenant authentication."
url: https://panop.io/threat-heartbeat/CVE-2026-61682/
---

# CVE-2026-61682 kcp - Broken Access Control

kcp < 0.31.4 and < 0.32.2 contains a broken access control vulnerability caused by front-proxy not removing inbound identity headers, letting authenticated tenants impersonate identities and bypass authorization, exploit requires tenant authentication.

CVSS base score 9.9 /10

Critical

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.38% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-61682)

## Details

Type

Broken Access Control

Impact

Broken Access Control, Data Tampering, Information Disclosure

CVSS vector

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

Published

18 September 2026

Updated

15 October 2026

Weakness

[CWE-290](https://cwe.mitre.org/data/definitions/290.html)

## Vendor fix

Update to versions 0.31.4 or 0.32.2 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-2026-61682](https://nvd.nist.gov/vuln/detail/CVE-2026-61682)
- [https://github.com/kcp-dev/kcp/commit/7437cdcfec8f927d1a9bf1b2dd1e075d038e27ca](https://github.com/kcp-dev/kcp/commit/7437cdcfec8f927d1a9bf1b2dd1e075d038e27ca)
- [https://github.com/kcp-dev/kcp/commit/f913ee890fb2fd9fa78e50c43474b078bfb6aeff](https://github.com/kcp-dev/kcp/commit/f913ee890fb2fd9fa78e50c43474b078bfb6aeff)
- [https://github.com/kcp-dev/kcp/releases/tag/v0.31.4](https://github.com/kcp-dev/kcp/releases/tag/v0.31.4)
- [https://github.com/kcp-dev/kcp/releases/tag/v0.32.2](https://github.com/kcp-dev/kcp/releases/tag/v0.32.2)
- [https://github.com/kcp-dev/kcp/security/advisories/GHSA-c8w2-fgvx-vhv4](https://github.com/kcp-dev/kcp/security/advisories/GHSA-c8w2-fgvx-vhv4)

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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

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

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