# CVE-2026-86544

## Summary

- **CVE ID:** CVE-2026-86544
- **Severity:** HIGH
- **CVSS Score:** 8.1 (CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N)
- **CWE:** CWE-863
- **Published:** Sep 7, 2026
- **Last Modified:** Sep 11, 2026

## Description

knowns versions before 0.30.0 contain an authorization bypass vulnerability where mutating code actions are incorrectly classified as read-only operations. Attackers with read-restricted sessions can exploit code.replace to modify permission configurations and escalate privileges on subsequent calls.

## Affected Products

- knowns-dev — knowns (0)
- knowns-dev — knowns (0.30.0)

## References

- [CNA](https://github.com/knowns-dev/knowns/security/advisories/GHSA-w323-3wpx-f7g5)
- [CNA](https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/permissions/registry.go#L99-L140)
- [CNA](https://github.com/knowns-dev/knowns/blob/v0.29.1/internal/permissions/guard.go#L44-L60)
- [CNA](https://github.com/knowns-dev/knowns/commit/a2c98fc5c313463576c9348beeec6a74ddd7333b)
- [CNA](https://github.com/knowns-dev/knowns/releases/tag/v0.30.0)
- [CNA](https://www.vulncheck.com/advisories/knowns-before-0.30.0-authorization-bypass-via-misclassified-code-actions)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.31%
- **EPSS Percentile:** 24.2

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._