What’s Vulnerable › Vulnerabilities

CVE-2026-48616

• Severity: critical (CVSS 9.3 v3.0)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-06-17 · updated 2026-10-24
• Weakness: CWE-284

Description

Rocket.Chat versions <8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, 7.13.9, 7.10.13 has an access control vulnerability in Livechat files. Protected file downloads at /file-upload/:fileId/:name authorize livechat access using rc_room_type=l with rc_rid+rc_token, but the authorization path does not verify that rc_rid matches the requested file's rid. Furthermore, :fileId is predictable via sequential MongoDB IDs, and :name can be anything, allowing unauthenticated discovery of all uploaded files.

Affected products

• Rocket.Chat: before 7.10.13; from 7.13.0 before 7.13.9; from 8.0.0 before 8.0.7; from 8.1.0 before 8.1.6; from 8.2.0 before 8.2.6; from 8.3.0 before 8.3.6 — fixed in 7.10.13, 7.13.9, 8.0.7, 8.1.6, 8.2.6, 8.3.6

How to fix

Upgrade to a fixed version: Rocket.Chat 7.10.13, 7.13.9, 8.0.7, 8.1.6. Check the vendor advisory for mitigations.

References

• https://github.com/RocketChat/Rocket.Chat/pull/40889
• https://hackerone.com/reports/3687142

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