# CVE-2026-25805: Zed does not show Parameter Values for MCP Tool Calls. Users cannot detect tool poisoning.

> Zed editor fails to display MCP tool call parameters, preventing users from detecting malicious tool poisoning during execution.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** An administrator
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 10 Feb 2026
- **Updated:** 10 Feb 2026
- **Also known as:** GHSA-f2g4-87h6-4pxq

## What is CVE-2026-25805?

CVE-2026-25805 is a medium-severity vulnerability in zed-industries zed, published on 10 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.

### Official description

Zed is a multiplayer code editor. Prior to 0.219.4, Zed does not show with which parameters a tool is being invoked, when asking for allowance. Further it does not show after the tool was being invoked, which parameters were used. Thus, maybe unwanted or even malicious values could be used without the user having a chance to notice it. Patched in Zed Editor 0.219.4 which includes expandable tool call details.

Weakness: CWE-356 (Missing User Interaction for Potentially Unsafe Action)

## Which versions are affected by CVE-2026-25805?

It affects 1 product.


Products: Zed Zed.

## How do I fix CVE-2026-25805?

No fix has been published for CVE-2026-25805 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-25805 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25805 exists.

## Other vulnerabilities in zed-industries zed

- [CVE-2026-27976](https://insights.sbomify.com/CVE-2026-27976/): Zed Extension Sandbox Escape via Tar Symlink Following (high 8.8)
- [CVE-2026-44461](https://insights.sbomify.com/CVE-2026-44461/): Zed: Remote Command Injection via Unquoted Environment Variable Keys (SSH / WSL Remote) (high 8.6)
- [CVE-2026-44463](https://insights.sbomify.com/CVE-2026-44463/): Zed: Allowlist Bypass via Environment Variable Injection in Terminal Tool Permissions (high 8.6)
- [CVE-2026-44465](https://insights.sbomify.com/CVE-2026-44465/): Zed: Zed IDE Arbitrary Code Execution via untrusted repository with poisoned .git/config (high 8.6)
- [CVE-2026-44466](https://insights.sbomify.com/CVE-2026-44466/): Zed: Allowlist Bypass via Bash Arithmetic Expansion in Terminal Tool Permissions (high 8.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-25805 and fix it if it is affected.

What it is: CVE-2026-25805 is a medium-severity vulnerability in zed-industries zed, published on 10 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-25805 exists.

Affected product: zed-industries zed. 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-2026-25805/ (Markdown: https://insights.sbomify.com/CVE-2026-25805/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-25805
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-25805
- OSV: https://osv.dev/vulnerability/CVE-2026-25805

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-25805/
Summaries are generated and may contain mistakes; the official description above is the record.