---
title: "CVE-2026-88939: knowns - Broken Access Control"
description: "knowns through 0.33.0 contains a broken access control caused by exemption of project.set action from permission guard checks, letting attackers with read-only agent sessions bypass restrictions and gain write access, exploit requires read-only agent session."
url: https://panop.io/threat-heartbeat/CVE-2026-88939/
---

# CVE-2026-88939 knowns - Broken Access Control

knowns through 0.33.0 contains a broken access control caused by exemption of project.set action from permission guard checks, letting attackers with read-only agent sessions bypass restrictions and gain write access, exploit requires read-only agent session.

CVSS base score 8.3 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.48% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-88939)

## Details

Type

Broken Access Control

Impact

Broken Access Control, Data Tampering

CVSS vector

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

Published

10 September 2026

Updated

15 October 2026

Weakness

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

## Vendor fix

Update to a version later than 0.33.0 or latest available version.

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-2026-88939](https://nvd.nist.gov/vuln/detail/CVE-2026-88939)
- [https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113](https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/guard.go#L104-L113)
- [https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54](https://github.com/knowns-dev/knowns/blob/v0.33.0/internal/permissions/registry.go#L51-L54)
- [https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg](https://github.com/knowns-dev/knowns/security/advisories/GHSA-h73x-698r-qrvg)
- [https://www.vulncheck.com/advisories/knowns-through-0.33.0-authorization-bypass-via-project-set-bootstrap-exemption](https://www.vulncheck.com/advisories/knowns-through-0.33.0-authorization-bypass-via-project-set-bootstrap-exemption)

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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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