CVE-2026-29198Network attack vector

Pre-auth account takeover via NoSQL token injection

Published Apr 22, 2026 · Updated Apr 22, 2026

NoSQL injection in Rocket.Chat before 8.3.0 across affected 7.x and 8.x branches allows remote attackers to take over an account. OAuth authentication forwards a non-string access_token query value into OAuthAccessTokens.findOneByAccessToken, so MongoDB operators such as $ne, $exists, $gt, or $regex select an existing token instead of matching an opaque token string. The endpoint requires no prior account, but exploitation requires an OAuth app and at least one generated access token; the selected token user's account is compromised.

CVSS severity9.8
Critical
EPSS probability0.42%
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 Rocket.Chat before 8.3.0 across affected 7.x and 8.x branches allows remote attackers to take over an account. OAuth authentication forwards a non-string access_token query value into OAuthAccessTokens.findOneByAccessToken, so MongoDB operators such as $ne, $exists, $gt, or $regex select an existing token instead of matching an opaque token string. The endpoint requires no prior account, but exploitation requires an OAuth app and at least one generated access token; the selected token user's account is compromised.

The record

CVE
CVE-2026-29198
Published
Apr 22, 2026
Updated
Apr 22, 2026
Vendor
Rocket.Chat Technologies Corp.
Product
Rocket.Chat
Classifications
CWE-89, T1190
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Apr 22, 2026CVE publishedPublication date reported by the CVE source.
  2. Apr 22, 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?

Affected versions are unavailable in this record. Check the vendor advisory for version and patch details.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Rocket.Chat Technologies Corp. · Rocket.ChatAffected versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-89Improper Neutralization of Special Elements used in an SQL Command ('SQL Injection')
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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