What is CVE-2026-121926?

CVE-2026-121926 is a high-severity vulnerability in Yezhihao Jt808-Server, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-11-04.

How severe is CVE-2026-121926?

High severity. CVSS v3 base score is 7.3 out of 10.

Auth bypass in Yezhihao Jt808-Server

CVE-2026-121926

A vulnerability was detected in yezhihao jt808-server up to a07f68c466b560b97ef41edb8a4966469abdf83e. Affected is the function WebMvcConfig.addInterceptors of the component Web Management API. The manipulation results in missing authentication. The attack may be launched remotely. The exploit is now public and may be used. This product operates on a rolling release basis, ensuring continuous delivery. Consequently, there are no version details for either affected or updated releases. The vendor was contacted early about this disclosure but did not respond in any way.

Vulnerability class: Broken Authentication

Published 2026-11-04 · last modified 2026-11-04.

CVSS v3 metric

CVSS v3 base score 7.3 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Yezhihao Jt808-Server — versions a07f68c466b560b97ef41edb8a4966469abdf83e

Weakness classification (CWE)

References

gist.github.com/janceye26-svg/eddbfcd42bbd90613dddcb7965408bf9 (exploit)
vuldb.com/cve/CVE-2026-121926 (third-party-advisory)
vuldb.com/submit/1023350 (third-party-advisory)
vuldb.com/vuln/431035 (technical-description, vdb-entry)
vuldb.com/vuln/431035/cti (signature, permissions-required)

Frequently asked questions

What is CVE-2026-121926?: CVE-2026-121926 is a high-severity vulnerability in Yezhihao Jt808-Server, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-11-04.
How severe is CVE-2026-121926?: High severity. CVSS v3 base score is 7.3 out of 10.