What is CVE-2026-86544?

CVE-2026-86544 is a high-severity vulnerability in Knowns-Dev Knowns, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-09-07.

How severe is CVE-2026-86544?

High severity. CVSS v3 base score is 8.1 out of 10.

Auth bypass in Knowns-Dev Knowns

CVE-2026-86544

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.

Vulnerability class: Broken Access Control

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:H/A:H.

Affected products

Knowns-dev Knowns

Weakness classification (CWE)

CWE-863 — Incorrect Authorization

References

disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (technical-description)
disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (vendor-advisory)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-86544?: CVE-2026-86544 is a high-severity vulnerability in Knowns-Dev Knowns, classified under Incorrect Authorization. CVSS score: 8.1/10. Published 2026-09-07.
How severe is CVE-2026-86544?: High severity. CVSS v3 base score is 8.1 out of 10.