CVE-2026-65645

MITRE NVD CVE.ORG JSON API

Summary

CVECVE-2026-65645
StatePUBLISHED
Assignerhackerone
Source PriorityCVE Program / NVD first with legacy fallback
Published2026-08-21 04:18:14 UTC
Updated2026-09-04 18:27:21 UTC
DescriptionRocket.Chat in versions before 8.8.0, 8.7.1, 8.6.2, 8.5.3, 8.4.6. 8.3.8, 8.2.8, 8.1.8, and 7.10.15, the Meteor DDP methods getThreadsList and getThreadMessages accept rid / tmid as raw, untyped parameters with no schema validation. A MongoDB operator object (e.g. {"$gt": "4"}) can be substituted for a string room-id or message-id. The authorization check resolves to a room the attacker already has access to, while the downstream data query fans out across all rooms - disclosing private thread parents and their full reply content to any low-privilege authenticated user. The REST route chat.getThreadsList was patched in v5.0 (HackerOne report #1446767) by adding rid: {type:'string'} AJV validation. The equivalent DDP method was never given the same fix and remains exploitable

Risk And Classification

Primary CVSS: v3.1 4.3 MEDIUM from ADP

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

EPSS: 0.002030000 probability, percentile 0.102580000 (date 2026-09-07)

Problem Types: CWE-20 | CWE-20 CWE-20 Improper Input Validation

VersionSourceTypeScoreSeverityVector
3.1ADPDECLARED4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
3.1134c704f-9b21-4f2e-91b3-4a467353bcc0Secondary4.3MEDIUMCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

CVSS v3.1 Breakdown

Attack Vector
Network
Attack Complexity
Low
Privileges Required
Low
User Interaction
None
Scope
Unchanged
Confidentiality
Low
Integrity
None
Availability
None

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N

NVD Known Affected Configurations (CPE 2.3)

TypeVendorProductVersionUpdateEditionLanguage
Application Rocket.chat Rocket.chat All All All All

Vendor Declared Affected Products

SourceVendorProductVersionPlatforms
CNA Rocket.Chat Rocket.Chat affected 8.8.0 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.7.1 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.6.2 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.5.3 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.4.6 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.3.8 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.2.8 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 8.1.8 semver Not specified
CNA Rocket.Chat Rocket.Chat affected 7.10.15 semver Not specified

References

ReferenceSourceLinkTags
github.com/RocketChat/Rocket.Chat/pull/41814 [email protected] github.com Patch, Vendor Advisory
hackerone.com/reports/3852135 [email protected] hackerone.com Third Party Advisory, Issue Tracking
CVE Program record CVE.ORG www.cve.org canonical
NVD vulnerability detail NVD nvd.nist.gov canonical, analysis

Vendor Comments And Credit

Discovery Credit

CNA: Aang (iamaangx028) (en)

© CVE.report 2026

Use of this information constitutes acceptance for use in an AS IS condition. There are NO warranties, implied or otherwise, with regard to this information or its use. Any use of this information is at the user's risk. It is the responsibility of user to evaluate the accuracy, completeness or usefulness of any information, opinion, advice or other content. EACH USER WILL BE SOLELY RESPONSIBLE FOR ANY consequences of his or her direct or indirect use of this web site. ALL WARRANTIES OF ANY KIND ARE EXPRESSLY DISCLAIMED. This site will NOT BE LIABLE FOR ANY DIRECT, INDIRECT or any other kind of loss.

CVE, CWE, and OVAL are registred trademarks of The MITRE Corporation and the authoritative source of CVE content is MITRE's CVE web site. This site includes MITRE data granted under the following license.

Free CVE JSON API cve.report/api

CVE.report and Source URL Uptime Status status.cve.report