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Vulnerability record · CVE-2026-38968 · published 2 July 2026

CVE-2026-38968: Ntopng vulnerability

Ntop · Ntopng

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.

9.8 CVSS 3.1 Critical EPSS 0.55% · top 56.0% CWE-341 · CWE-341
9.8CVSS 3.1 base score
0.55%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
8 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/ntop/ntopng/commit/14e22497233dc7d31d19dccb74b13bb073d16c2c Patch
https://github.com/ntop/ntopng/commit/179a346ceb6239fd36128ccca3efa8f9ea61eeb5 Patch

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

8.8CVE-2017-5473Ntopng cross-site request forgery vulnerabilityCross-site request forgery (CSRF) vulnerability in ntopng through 2.4 allows remote attackers to hijack the authentication of arbitrary users, as dem…EPSS 3.6%8.1CVE-2018-12520Ntopng vulnerabilityAn issue was discovered in ntopng 3.4 before 3.4.180617. The PRNG involved in the generation of session IDs is not seeded at program startup. This re…EPSS 11%7.5CVE-2017-7458Ntopng null pointer dereference vulnerabilityThe NetworkInterface::getHost function in NetworkInterface.cpp in ntopng before 3.0 allows remote attackers to cause a denial of service (NULL pointe…EPSS 1.9%7.5CVE-2017-7459Ntopng injection vulnerabilityntopng before 3.0 allows HTTP Response Splitting.EPSS 0.87%6.1CVE-2017-7416Ntopng cross-site scripting vulnerabilityntopng before 3.0 allows XSS because GET and POST parameters are improperly validated.EPSS 0.63%6.0CVE-2015-8368Ntopng vulnerabilityntopng (aka ntop) before 2.2 allows remote authenticated users to change the login context and gain privileges via the user cookie and username param…EPSS 5.1%4.3CVE-2014-5464Ntopng cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in the nDPI traffic classification library in ntopng (aka ntop) before 1.2.1 allows remote attackers to inje…EPSS 4.5%4.3CVE-2014-4329Ntopng cross-site scripting vulnerabilityCross-site scripting (XSS) vulnerability in lua/host_details.lua in ntopng 1.1 allows remote attackers to inject arbitrary web script or HTML via the…EPSS 1.2%

Source: NIST National Vulnerability Database (record CVE-2026-38968), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.