# CVE-2026-15628: zhayujie chatgpt-on-wechat CowAgent Vision Tool vision.py Vision._download_to_data_url server-side request forgery

> Attackers can exploit a server-side request forgery flaw in the Vision Tool to access internal resources or bypass security controls.

- **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:** 14 Jul 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-76cc-739m-wwpv

## What is CVE-2026-15628?

CVE-2026-15628 is a medium-severity server-side request forgery vulnerability in zhayujie chatgpt-on-wechat CowAgent, published on 14 Jul 2026. Any signed-in user can exploit it over the network, with no action from the victim.

### Official description

A security flaw has been discovered in zhayujie chatgpt-on-wechat CowAgent up to 2.1.1. This issue affects the function Vision._download_to_data_url of the file agent/tools/vision/vision.py of the component Vision Tool. Performing a manipulation of the argument image results in server-side request forgery. It is possible to initiate the attack remotely. The exploit has been released to the public and may be used for attacks. Upgrading to version 2.1.2 is capable of addressing this issue. The patch is named e85290cddcbb5ffc9c235927f4c92e5b4c3ec264. The affected component should be upgraded.

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

## Which versions are affected by CVE-2026-15628?


## How do I fix CVE-2026-15628?

No fix has been published for CVE-2026-15628 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-15628 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-15628 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-15628 and fix it if it is affected.

What it is: CVE-2026-15628 is a medium-severity server-side request forgery vulnerability in zhayujie chatgpt-on-wechat CowAgent, published on 14 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-2026-15628 exists.

Affected product: zhayujie chatgpt-on-wechat 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-2026-15628/ (Markdown: https://insights.sbomify.com/CVE-2026-15628/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-15628
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-15628
- OSV: https://osv.dev/vulnerability/CVE-2026-15628

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-15628/
Summaries are generated and may contain mistakes; the official description above is the record.