CVE-2026-38968: Software Security Vulnerability Vulnerability

CRITICAL
Advisory Identifier: GHSA-5rrm-76q9-hp77
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CVSS 9.8
CWE-341
Published
Advisory Summary

CVE-2026-38968 is a CRITICAL (CVSS 9.8) security vulnerability vulnerability (CWE-341: Predictable from Observable State) affecting Software libraries in the Maven ecosystem. The weakness occurs when a number or object is predictable based on observations that the attacker can make about the state of the system or network, such as time, process id, etc.. Remediation is available in the latest vendor maintenance releases.

CVE-2026-38968 at a Glance

CVE Identifier CVE-2026-38968
GHSA Identifier GHSA-5rrm-76q9-hp77
Severity CRITICAL
CVSS v3.1 Base Score 9.8
CWE Classification CWE-341: Predictable from Observable State
Affected Product Software
Package Ecosystem Maven
Published Date
Last Updated

Security Impact

CVSS: 9.8

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Unchanged (S:U)
Confidentiality High (C:H)
Integrity High (I:H)
Availability High (A:H)

How to Fix CVE-2026-38968

To remediate this vulnerability, upgrade all affected Software dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

mvn dependency:tree

How to Check if You Are Affected

To determine whether your Java application is affected by CVE-2026-38968, inspect your build dependencies using the Maven Dependency Plugin:

mvn dependency:tree

Analyze the terminal output to locate any version of Software in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than the patched release), your application is affected.

Note: The mvn dependency:tree command inspects the resolved dependency graph declared in your project's POM files; it does not perform automated security scanning or inspect runtime dynamic classpaths. Always verify runtime container classpaths and shaded JARs.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-341: Predictable from Observable State, where a number or object is predictable based on observations that the attacker can make about the state of the system or network, such as time, process id, etc. In Software, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.

References

NVD — CVE-2026-38968 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-38968
Security Fix Commit FIX COMMIT
https://github.com/ntop/ntopng/commit/14e22497233dc7d31d19dccb74b13bb073d16c2c
Security Fix Commit FIX COMMIT
https://github.com/ntop/ntopng/commit/179a346ceb6239fd36128ccca3efa8f9ea61eeb5

Frequently Asked Questions

What is CVE-2026-38968?
CVE-2026-38968 is a security vulnerability in Software classified as a security vulnerability vulnerability under CWE-341: Predictable from Observable State.
Which Software versions are affected?
Affected versions include releases prior to current release patches.
What version fixes CVE-2026-38968?
Upgrading to current release patches (or the latest patched release for your respective branch) resolves the vulnerability.
What is the CVSS score of CVE-2026-38968?
CVE-2026-38968 has a CVSS v3.1 base score of 9.8 (CRITICAL) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.
What CWE is associated with CVE-2026-38968?
CVE-2026-38968 is classified under CWE-341: Predictable from Observable State (A number or object is predictable based on observations that the attacker can make about the state of the system or network, such as time, process ID, etc.).
How can I check Maven dependencies for CVE-2026-38968?
Run the dependency tree command: 'mvn dependency:tree'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-5rrm-76q9-hp77",
  "modified" : "2026-07-06T18:30:42Z",
  "published" : "2026-07-02T21:32:15Z",
  "aliases" : [ "CVE-2026-38968" ],
  "details" : "ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking. HTTP session identifiers in src/HTTPserver.cpp use weak time-seeded pseudo-randomness during session creation. As a result, fresh authenticated logins can receive deterministic or colliding session cookies under attacker-controlled timing.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H"
  } ],
  "affected" : [ ],
  "references" : [ {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-38968"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ntop/ntopng/commit/14e22497233dc7d31d19dccb74b13bb073d16c2c"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/ntop/ntopng/commit/179a346ceb6239fd36128ccca3efa8f9ea61eeb5"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-341" ],
    "severity" : "CRITICAL",
    "github_reviewed" : false,
    "github_reviewed_at" : null,
    "nvd_published_at" : "2026-07-02T21:16:55Z"
  }
}