CVE-2026-30833Network attack vector

Unauthenticated NoSQL injection via unvalidated username selector

Published Mar 6, 2026 · Updated Mar 6, 2026

NoSQL injection in affected Rocket.Chat releases allows remote attackers to alter MongoDB login queries through the DDP WebSocket. The loginViaUsername flow passes the client-supplied username directly to Users.findOne as a MongoDB selector without enforcing a primitive string. Remote attackers can select unintended user records and log in without a full username; the advisory does not establish arbitrary account takeover.

CVSS severity6.9
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

NoSQL injection in affected Rocket.Chat releases allows remote attackers to alter MongoDB login queries through the DDP WebSocket. The loginViaUsername flow passes the client-supplied username directly to Users.findOne as a MongoDB selector without enforcing a primitive string. Remote attackers can select unintended user records and log in without a full username; the advisory does not establish arbitrary account takeover.

The record

CVE
CVE-2026-30833
Published
Mar 6, 2026
Updated
Mar 6, 2026
Vendor
Rocket.Chat Technologies Corp.
Product
Rocket.Chat
Classifications
CWE-943, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Mar 6, 2026CVE publishedPublication date reported by the CVE source.
  2. Mar 6, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 7.10.8
  2. Affected versionversion=< 7.11.5
  3. Affected versionversion=< 7.12.5
  4. Affected versionversion=< 7.13.4
  5. Affected versionversion=< 8.0.2
  6. Affected versionversion=< 8.1.1
  7. Affected versionversion=< 8.2.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket.Chat Technologies Corp. · Rocket.Chatversion=< 7.10.8; version=< 7.11.5; version=< 7.12.5; version=< 7.13.4; version=< 8.0.2; version=< 8.1.1; version=< 8.2.0

Published CVSS scores

5.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:L/A:N
6.9GitHubCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:L/VA:N/SC:N/SI:N/SA:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-943Improper Neutralization of Special Elements in Data Query Logic
T1190Exploit Public-Facing Application

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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