# CVE-2026-16194: zhayujie CowAgent web_fetch.py WebFetch.execute server-side request forgery

> Remote attackers can exploit a server-side request forgery vulnerability in CowAgent's web fetch tool to access internal resources.

- **Severity:** Medium 5.3 (`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`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 18 Jul 2026
- **Updated:** 20 Jul 2026
- **Also known as:** GHSA-wcfc-xp4r-c7rv

## What is CVE-2026-16194?

CVE-2026-16194 is a medium-severity server-side request forgery vulnerability in zhayujie CowAgent, published on 18 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A vulnerability was determined in zhayujie CowAgent up to 2.1.1. This affects the function WebFetch.execute of the file agent/tools/web_fetch/web_fetch.py. Executing a manipulation of the argument url can lead to server-side request forgery. The attack may be performed from remote. The exploit has been publicly disclosed and may be utilized. Upgrading to version 2.1.2 is able to mitigate this issue. This patch is called ea47f3097eed4f8295c4cb3d76ecb97e0f43d632. It is recommended to upgrade the affected component. The vendor was contacted early, responded in a very professional manner and quickly released a fixed version of the affected product.

Weakness: CWE-918 (Server-Side Request Forgery)

## Which versions are affected by CVE-2026-16194?


## How do I fix CVE-2026-16194?

No fix has been published for CVE-2026-16194 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-16194 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16194 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-16194 and fix it if it is affected.

What it is: CVE-2026-16194 is a medium-severity server-side request forgery vulnerability in zhayujie CowAgent, published on 18 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-16194 exists.

Affected product: zhayujie CowAgent. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-16194/ (Markdown: https://insights.sbomify.com/CVE-2026-16194/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-16194
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-16194
- OSV: https://osv.dev/vulnerability/CVE-2026-16194

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-16194/
Summaries are generated and may contain mistakes; the official description above is the record.