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VulnerabilityPublished

CVE-2026-72918: RocketChat Rocket.Chat · Missing Authorization

Affects RocketChat Rocket.ChatSource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium · fixed in 8.6.1 : update RocketChat Rocket.Chat when convenient.

Data as of 7 Nov 2026, 23:24 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 13% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 8.6.1, 8.5.2, 8.4.5 +5
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:L/I:L/A:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 10 Aug 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 7 Nov 2026.

What to do

Upgrade to a fixed release listed under Affected software.

Affected software

ProductAffectedFixed in
RocketChatRocket.ChatAffected
  • >=8.6.0 <8.6.1
Fixed in
  • 8.6.1
RocketChatRocket.ChatAffected
  • >=8.5.0 <8.5.2
Fixed in
  • 8.5.2
RocketChatRocket.ChatAffected
  • >=8.4.0 <8.4.5
Fixed in
  • 8.4.5
RocketChatRocket.ChatAffected
  • >=8.3.0 <8.3.7
Fixed in
  • 8.3.7
RocketChatRocket.ChatAffected
  • >=8.2.0 <8.2.7
Fixed in
  • 8.2.7
RocketChatRocket.ChatAffected
  • >=8.1.0 <8.1.7
Fixed in
  • 8.1.7

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

AI-suggested

Upgrade Rocket.Chat to version 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, or 8.6.1 or later, where this vulnerability is fixed. No other mitigation is indicated by the vendor advisory.

Description

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, and 8.6.1, the stream-notify-user stream in the WebSocket protocol allows an authenticated user to write arbitrary notification bodies because the sender is not checked, and the client-side UI can create an ephemeral fake message in another user's currently open chat. This issue is fixed in versions 7.10.14, 8.0.8, 8.1.7, 8.2.7, 8.3.7, 8.4.5, 8.5.2, and 8.6.1.

References

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