CVE-2022-42951Network attack vector

Unauthenticated remote code execution via nocookie startup window

Published Feb 6, 2023 · Updated Mar 26, 2025

Authentication bypass in Couchbase Server 6.5.x, 6.6.0 through 6.6.5, 7.0.0 through 7.0.4, and 7.1.0 through 7.1.1 allows attackers to execute code. The Cluster Manager sets its Erlang distribution security cookie to nocookie before cluster-management authentication starts, leaving the protocol without access controls. Attackers must connect during the brief node-startup window; a maintained connection permits code execution on any cluster node with Couchbase Server privileges.

CVSS severity8.1
High
EPSS probability0.66%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Authentication bypass in Couchbase Server 6.5.x, 6.6.0 through 6.6.5, 7.0.0 through 7.0.4, and 7.1.0 through 7.1.1 allows attackers to execute code. The Cluster Manager sets its Erlang distribution security cookie to nocookie before cluster-management authentication starts, leaving the protocol without access controls. Attackers must connect during the brief node-startup window; a maintained connection permits code execution on any cluster node with Couchbase Server privileges.

The record

CVE
CVE-2022-42951
Published
Feb 6, 2023
Updated
Mar 26, 2025
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-362, CWE-287, T1210
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Feb 6, 2023CVE publishedPublication date reported by the CVE source.
  2. Mar 26, 2025Record 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 buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

8.1CISA-ADPCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
8.1NVDCVSS:3.1/AV:N/AC:H/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-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')
CWE-287Improper Authentication
T1210Exploitation of Remote Services

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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