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.

No CVSS v4.0

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

The EPSS score is 0.00379.

Exploitation none

Automatable yes

Technical Impact total

Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).

Vendor Product Default status Versions
n/a n/a affected
Version Status Constraints
n/a affected —

No data.

No data.

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Vendors Products
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Project Subscriptions

Vendors Products
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Ntopng Subscribe
Advisories

No advisories yet.

Fixes

Solution

No solution given by the vendor.

Workaround

No workaround given by the vendor.

References
Link Providers
https://github.com/ntop/ntopng/commit/14e22497233dc7d31d19dccb74b13bb073d16c2c cve-icon
https://github.com/ntop/ntopng/commit/179a346ceb6239fd36128ccca3efa8f9ea61eeb5 cve-icon
History

Mon, 27 Jul 2026 00:45:00 +0000

Type Values Removed Values Added
Title Predictable HTTP Session ID Leading to Session Hijacking in ntopng 6.6

Fri, 24 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Vulnerability in ntopng 6.6

Tue, 21 Jul 2026 13:00:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Vulnerability in ntopng 6.6

Fri, 17 Jul 2026 12:15:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng

Wed, 15 Jul 2026 10:30:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng

Tue, 14 Jul 2026 18:00:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng

Mon, 13 Jul 2026 15:30:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng

Sun, 12 Jul 2026 09:30:00 +0000

Type Values Removed Values Added
Title Predictable HTTP Session Identifier Leading to Session Hijacking in ntopng 6.6

Sat, 11 Jul 2026 07:30:00 +0000

Type Values Removed Values Added
Title Predictable HTTP Session Identifier Leading to Session Hijacking in ntopng 6.6

Fri, 10 Jul 2026 11:00:00 +0000

Type Values Removed Values Added
Title Weak Session ID Generation in ntopng Enables Hijacking

Thu, 09 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Title Weak Session ID Generation in ntopng Enables Hijacking

Thu, 09 Jul 2026 02:00:00 +0000

Type Values Removed Values Added
Title ntopng Predictable Session Identifier Leading to Session Hijacking

Wed, 08 Jul 2026 07:15:00 +0000

Type Values Removed Values Added
Title ntopng Predictable Session Identifier Leading to Session Hijacking

Tue, 07 Jul 2026 20:30:00 +0000

Type Values Removed Values Added
Title Predictable HTTP Session Identifier in ntopng 6.6 Allows Session Hijacking
Weaknesses CWE-330

Mon, 06 Jul 2026 20:00:00 +0000

Type Values Removed Values Added
Title Predictable HTTP Session Identifier in ntopng 6.6 Allows Session Hijacking
Weaknesses CWE-330

Mon, 06 Jul 2026 18:30:00 +0000

Type Values Removed Values Added
Weaknesses CWE-341
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Mon, 06 Jul 2026 14:30:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng
Weaknesses CWE-330

Mon, 06 Jul 2026 02:45:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier Leading to Session Hijacking in ntopng
Weaknesses CWE-330

Sun, 05 Jul 2026 13:00:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier in ntopng 6.6 Enables Session Hijacking
Weaknesses CWE-330

Sat, 04 Jul 2026 21:15:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifier in ntopng 6.6 Enables Session Hijacking
Weaknesses CWE-330

Sat, 04 Jul 2026 10:45:00 +0000

Type Values Removed Values Added
Title Predictable session identifiers allow session hijacking in ntopng
Weaknesses CWE-613

Sat, 04 Jul 2026 02:45:00 +0000

Type Values Removed Values Added
Title Predictable session identifiers allow session hijacking in ntopng
Weaknesses CWE-613

Fri, 03 Jul 2026 18:45:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifiers Permit Session Hijacking in ntopng 6.6
Weaknesses CWE-613

Fri, 03 Jul 2026 04:00:00 +0000

Type Values Removed Values Added
Title Predictable Session Identifiers Permit Session Hijacking in ntopng 6.6
Weaknesses CWE-613

Thu, 02 Jul 2026 21:45:00 +0000

Type Values Removed Values Added
First Time appeared Ntop
Ntop ntopng
Vendors & Products Ntop
Ntop ntopng

Thu, 02 Jul 2026 20:45:00 +0000

Type Values Removed Values Added
Description 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

Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: mitre

Published:

Updated: 2026-07-06T17:16:49.092Z

Reserved: 2026-04-06T00:00:00.000Z

Link: CVE-2026-38968

cve-icon Vulnrichment

Updated: 2026-07-06T17:15:55.314Z

cve-icon NVD

No data.

cve-icon Redhat

No data.

cve-icon OpenCVE Enrichment

Updated: 2026-07-27T00:30:03Z

Weaknesses