What is CVE-2026-66005?

CVE-2026-66005 is a medium-severity vulnerability in Janhq Jan, classified under CWE-183. CVSS score: 6.3/10. Published 2026-07-24.

How severe is CVE-2026-66005?

Medium severity. CVSS v3 base score is 6.3 out of 10.

Vulnerability in Janhq Jan

CVE-2026-66005

Jan through 0.8.4, fixed in commit 3e1c1e7, contains a CORS misconfiguration vulnerability in its local API server that allows network-adjacent attackers to bypass trusted host restrictions by exploiting the server's replacement of user-co…

CVSS v3 metric

CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:L.

Affected products

Janhq Jan — versions 0, 3e1c1e724f696620d89bb4a9cc18a380e0753757

Weakness classification (CWE)

CWE-183
CWE-942 — Permissive Cross-domain Policy with Untrusted Domains

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (technical-description, exploit)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-66005?: CVE-2026-66005 is a medium-severity vulnerability in Janhq Jan, classified under CWE-183. CVSS score: 6.3/10. Published 2026-07-24.
How severe is CVE-2026-66005?: Medium severity. CVSS v3 base score is 6.3 out of 10.