CVE-2025-11602Network attack vector

Untargeted information leak via uninitialized Bolt BitMask

Published Oct 31, 2025 · Updated Oct 31, 2025

Neo4j Community and Enterprise editions 5.26.0 through 5.26.14 and 2025.1.0 through 2025.10.0 allow remote attackers to read one byte. The Bolt handshake allocates a self-allocated BitMask without initializing its storage, so a server response can contain a byte retained from a previous connection. No authentication or user interaction is required, but attack requirements are present and the attacker cannot select the leaked value.

CVSS severity6.3
Medium
EPSS probability0.30%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Neo4j Community and Enterprise editions 5.26.0 through 5.26.14 and 2025.1.0 through 2025.10.0 allow remote attackers to read one byte. The Bolt handshake allocates a self-allocated BitMask without initializing its storage, so a server response can contain a byte retained from a previous connection. No authentication or user interaction is required, but attack requirements are present and the attacker cannot select the leaked value.

The record

CVE
CVE-2025-11602
Published
Oct 31, 2025
Updated
Oct 31, 2025
Vendor
Neo4j
Product
Neo4j Enterprise Edition
Classifications
CWE-226, CAPEC-410
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Oct 31, 2025CVE publishedPublication date reported by the CVE source.
  2. Oct 31, 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?

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

  1. Affected versionversion=2025.1.0 <2025.10.1
  2. Affected versionversion=5.26.0 <5.26.15

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Neo4j · Neo4j Enterprise Editionversion=2025.1.0 <2025.10.1; version=5.26.0 <5.26.15
Neo4j · Neo4j Community Editionversion=2025.1.0 <2025.10.1; version=5.26.0 <5.26.15

Published CVSS scores

6.3Neo4jCVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/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 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-226Sensitive Information in Resource Not Removed Before Reuse
CAPEC-410Information Elicitation

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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