CVE-2026-38968Network attack vector

Session hijacking via time-seeded session identifiers

Published Jul 2, 2026 · Updated Jul 2, 2026

Predictable session identifiers in ntopng 6.6 and earlier allow remote attackers to hijack authenticated web sessions. During live web login, generate_session_id in src/HTTPserver.cpp seeds rand() with the current time and hashes its output with the user and group, making cookies deterministic or colliding. Exploitation requires timing a fresh authenticated login closely enough to predict or collide with its new cookie, after which the attacker can assume that session's privileges.

CVSS severity9.8
Critical
EPSS probability0.55%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Predictable session identifiers in ntopng 6.6 and earlier allow remote attackers to hijack authenticated web sessions. During live web login, generate_session_id in src/HTTPserver.cpp seeds rand() with the current time and hashes its output with the user and group, making cookies deterministic or colliding. Exploitation requires timing a fresh authenticated login closely enough to predict or collide with its new cookie, after which the attacker can assume that session's privileges.

The record

CVE
CVE-2026-38968
Published
Jul 2, 2026
Updated
Jul 2, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-341, T1539
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jul 2, 2026CVE publishedPublication date reported by the CVE source.
  2. Jul 2, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

9.8CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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.

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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-341Predictable from Observable State
T1539Steal Web Session Cookie

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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