What is CVE-2026-6129?

CVE-2026-6129 is a high-severity vulnerability in Zhayujie Chatgpt-On-Wechat Cowagent, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-04-12.

How severe is CVE-2026-6129?

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

Auth bypass in Zhayujie Chatgpt-On-Wechat Cowagent

CVE-2026-6129

A vulnerability was detected in zhayujie chatgpt-on-wechat CowAgent up to 2.0.4. This affects an unknown function of the component Agent Mode Service. Performing a manipulation results in missing authentication. The attack can be initiated remotely. The exploit is now public and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Vulnerability class: Broken Authentication

Published 2026-04-12 · last modified 2026-06-17.

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

EPSS: 0.007 (49.3th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 49th percentile — 49.3% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.004 · newest: 0.007 · change: +0.003

Affected products

Zhayujie Chatgpt-On-Wechat Cowagent — versions 2.0.0, 2.0.1, 2.0.2

Weakness classification (CWE)

References

vuldb.com/vuln/356992 (vdb-entry)
vuldb.com/vuln/356992/cti (signature, permissions-required)
vuldb.com/submit/795272 (third-party-advisory)
github.com/zhayujie/chatgpt-on-wechat/issues/2741 (issue-tracking)
github.com/zhayujie/chatgpt-on-wechat/issues/2741 (issue-tracking, exploit)

Frequently asked questions

What is CVE-2026-6129?: CVE-2026-6129 is a high-severity vulnerability in Zhayujie Chatgpt-On-Wechat Cowagent, classified under Improper Authentication. CVSS score: 7.3/10. Published 2026-04-12.
How severe is CVE-2026-6129?: High severity. CVSS v3 base score is 7.3 out of 10.