ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking.

published 2026-07-02 4 mo ago modified 2026-07-08 4 mo ago also EUVD-2026-41472

cvss: 9.8; version 3.1, CNA
cisa kev: Not listed; not in CISA's catalog
epss: 0.6%; EPSS 0.6% chance of exploitation in 30 days, percentile 46%
public exploits: 0; none known

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.

Patch / fix

distros 1 links 2

ntopng Azure Linux 3.0 5.2.1-7

azure linux advisories AZL-92103

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

github.com/ntop/ntopng@179a346 commit
github.com/ntop/ntopng@14e2249 commit

CISA SSVC

Exploitation: none
Automatable: yes
Technical impact: total
Assessed: 4 mo ago (2026-07-06)

Exploit prediction

0.55% chance of exploitation in the next 30 days, higher than 46% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by	version	score	vector
CISA ADP	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
CNA	3.1	9.8	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Classification

Weakness

CWE-341 Predictable from Observable State

References

Sources

CVE List CVE-2026-38968
NVD CVE-2026-38968

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.

Summary