Which versions of RocketChat are affected by CVE-2025-5892?

Organizations using RocketChat should be aware of moderate risk from CVE-2025-5892, a resource exhaustion vulnerability rated CVSS 4.3. Service availability could be impacted.

Is there a public PoC exploit available for CVE-2025-5892?

Yes, a public proof-of-concept exploit is available for CVE-2025-5892. Prioritise patching immediately. EPSS: 0.2%.

How to fix or mitigate CVE-2025-5892?

Within 30 days: Identify affected systems running RocketChat and apply vendor patches as part of regular patch cycle. Monitor vendor channels for patch availability.

RocketChat CVE-2025-5892

Q: What is the CVSS score of CVE-2025-5892?

CVE-2025-5892 has a CVSS 4.0 base score of 2.1 (Low). CVSS vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X. EPSS exploitation probability: 0.2%.

EUVD-2025-17566 LOW

Uncontrolled Resource Consumption (CWE-400)

2025-06-09 cna@vuldb.com

Denial Of Service Rocket Chat

2.1

CVSS 4.0 · NVD

Severity by source

NVD PRIMARY

2.1 LOW

CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

vuln.today AI

4.3 MEDIUM

AV:N, AC:L, PR:L (authenticated), UI:N, A:L (DoS only).

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

4.0 AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N

Primary rating from NVD.

CVSS VectorNVD

Attack Vector

Network

Attack Complexity

Low

Privileges Required

Low

User Interaction

None

Scope

Lifecycle Timeline

Source Code Evidence Fetched

Jul 26, 2026 - 13:30 vuln.today

Severity Changed

Apr 29, 2026 - 01:11 NVD

MEDIUM LOW

CVSS changed

Apr 29, 2026 - 01:11 NVD

4.3 (MEDIUM) 2.1 (LOW)

EUVD ID Assigned

Mar 14, 2026 - 19:21 euvd

EUVD-2025-17566

Analysis Generated

Mar 14, 2026 - 19:21 vuln.today

PoC Detected

Jul 10, 2025 - 16:24 vuln.today

Public exploit code

CVE Published

Jun 09, 2025 - 20:15 nvd

MEDIUM 4.3

CVE Published

Jun 09, 2025 - 20:15 cve.org

LOW 2.1

DescriptionCVE.org

A vulnerability, which was classified as problematic, has been found in RocketChat up to 7.6.1. This issue affects the function parseMessage of the file /apps/meteor/app/irc/server/servers/RFC2813/parseMessage.js. The manipulation of the argument line leads to inefficient regular expression complexity. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used.

AnalysisAI

Inefficient regular expression in RocketChat's IRC parseMessage function allows remote authenticated users to cause a denial of service via crafted input. A publicly available exploit exists, but no active exploitation has been reported. EPSS score is low (0.22%), indicating low exploitation likelihood.

Technical ContextAI

The vulnerability is a Regular Expression Denial of Service (ReDoS) in the parseMessage function of RocketChat's IRC server module (RFC2813). The affected regex /^:|\s+:/ exhibits catastrophic backtracking when processing specially crafted input. CPE data confirms all RocketChat versions up to 7.6.1 are affected. The CWE-400 class covers resource exhaustion via uncontrolled resource consumption.

RemediationAI

Upgrade to RocketChat version 7.6.2 or later, which includes the fix from GitHub pull request #35711. The fix modifies the regex to prevent catastrophic backtracking. No workarounds are documented; as a compensating control, restrict access to the IRC server functionality to trusted users only, though this may not be feasible in all deployments.