CVE-2026-48616
Unauthenticated file download via Rocket.Chat Livechat endpoint.
Is CVE-2026-48616 being exploited?
Not confirmed. CVE-2026-48616 does not appear in CISA's Known Exploited Vulnerabilities catalog, which records only exploitation that has been observed and reported publicly. That is evidence of absence of a report, not evidence the flaw is unattacked. EPSS currently estimates a 0.33% probability of exploitation in the next 30 days.
How severe is CVE-2026-48616?
CVE-2026-48616 is rated Critical with a CVSS score of 9.3. Severity describes how bad exploitation would be, not how likely it is: pair it with exploitation evidence before deciding what to patch first.
Is there a patch for CVE-2026-48616?
Yes. A fix has been recorded for CVE-2026-48616. The vendor advisory is the authority on the exact fixed version — apply it from there rather than from a summary.
What does CVE-2026-48616 affect?
CVE-2026-48616 affects Rocket.Chat <8.5.1 (affected builds), Livechat file-download endpoint. Confirm the exact affected versions against the vendor advisory before deciding you are exposed.
What should I do about CVE-2026-48616?
Upgrade to patched release (>=8.5.1) and review file-access checks.
Exploitation status reflects CISA's KEV catalog as we last synced it. Check the catalog directly.
Unauthenticated disclosure of all uploaded files via predictable fileId in /file-upload; mass data exfiltration risk.
Patch when possible
- affected< 8.5.1
- affected< 8.4.4
- affected< 8.3.6
- affected< 8.2.6
- affected< 8.1.6
- affected< 8.0.7
- affected< 7.13.9
- affected< 7.10.13
As published in the CVE Program record. A version outside these ranges is not a statement that it is unaffected — vendors sometimes understate a range, and distribution-backported builds carry upstream numbers that do not reflect what was patched into them.