CVE-2026-38968: ntopng through 6.6 is vulnerable to Predictable Session Identifier which can lead to Session Hijacking

Q: How do I fix CVE-2026-38968?

ntopng: upgrade to newer than 6.6. Exact commands for each OS are on this page.

Q: Is CVE-2026-38968 being exploited?

CVE-2026-38968 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

Q: What does CVE-2026-38968 affect?

CVE-2026-38968 affects ntopng. Severity is critical (CVSS 9.8). 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 authen

Q: How urgent is CVE-2026-38968?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

This month

CRITICAL 9.8REMOTEUPGRADE

CVE-2026-38968 is a critical-severity flaw (CVSS 9.8) affecting ntopng. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

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.

Why this priority

Critical severity
Remotely exploitable, no login, no user action

A fixed release or distro patch exists.

Risk facts

CVSS score	9.8 (Critical)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	None
User interaction	None
EPSS exploit chance	0.6% (top 54%)
CISA exploited list	No
Weakness	CWE-341
Published	2026-07-02
Last modified	2026-07-08

Publisher (CNA): MITRE · Vendor: ntop

Last updated 2026-07-08 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-07-02 21:16 UTCPublished CVE record published
2026-07-08 18:39 UTCUpdated Record last modified

ntop ntopng UPGRADE

Affected: <= 6.6

Fixed in: newer than 6.6

Safe to downgrade to: no unaffected older release

1. Check installed version

apt-cache policy ntopng || rpm -q ntopng || ntopng --version

2. UPGRADE to newer than 6.6 (Debian / Ubuntu)

sudo apt update && sudo apt install --only-upgrade ntopng

2. UPGRADE (RHEL / Amazon Linux / Fedora)

sudo dnf upgrade ntopng

Note

Distros often backport fixes without changing the version number. Confirm with the distro advisory or changelog.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-38968?

ntopng: upgrade to newer than 6.6. Exact commands for each OS are on this page.

Is CVE-2026-38968 being exploited?

CVE-2026-38968 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-38968 affect?

CVE-2026-38968 affects ntopng. Severity is critical (CVSS 9.8). 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 authen

How urgent is CVE-2026-38968?

Priority 51/100. Critical severity; Remotely exploitable, no login, no user action

References

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