# CVE-2026-108769: zhayujie CowAgent Markdown Rendering Markdown.tsx denial of service

> Remote attackers can cause a denial of service in CowAgent via the Markdown rendering component, requiring attention from users of this chatbot.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/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:** 11 Oct 2026
- **Updated:** 14 Oct 2026
- **Also known as:** GHSA-3495-753p-x98c

## What is CVE-2026-108769?

CVE-2026-108769 is a medium-severity denial of service vulnerability in zhayujie CowAgent, published on 11 Oct 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 CowAgent up to 2.2.0. This affects an unknown part of the file Markdown.tsx of the component Markdown Rendering. The manipulation results in denial of service. It is possible to launch the attack remotely. The exploit has been released to the public and may be used for attacks. The vendor was contacted early about this disclosure but did not respond in any way.

Weakness: CWE-404 (Improper Resource Shutdown or Release)

## Which versions are affected by CVE-2026-108769?


## How do I fix CVE-2026-108769?

No fix has been published for CVE-2026-108769 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-108769 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-108769 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-108769 and fix it if it is affected.

What it is: CVE-2026-108769 is a medium-severity denial of service vulnerability in zhayujie CowAgent, published on 11 Oct 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-2026-108769 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-2026-108769/ (Markdown: https://insights.sbomify.com/CVE-2026-108769/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-108769
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-108769
- OSV: https://osv.dev/vulnerability/CVE-2026-108769

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-108769/
Summaries are generated and may contain mistakes; the official description above is the record.