CVE-2006-6969: Jetty before 4.2.27, 5.1 before 5.1.12, 6.0 before 6.0.2, and 6.1 before 6.1.0pre3 generates predictable sessi

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MEDIUM 6.8DOWNGRADE

CVE-2006-6969 is a medium-severity flaw (CVSS 6.8) affecting jetty http server. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Jetty before 4.2.27, 5.1 before 5.1.12, 6.0 before 6.0.2, and 6.1 before 6.1.0pre3 generates predictable session identifiers using java.util.random, which makes it easier for remote attackers to guess a session identifier through brute force attacks, bypass authentication requirements, and possibly conduct cross-site request forgery attacks.

Why this priority

No elevated risk signals yet

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	6.8 (Medium)
EPSS exploit chance	1.6% (top 24%)
CISA exploited list	No
Published	2007-02-07
Last modified	2026-06-16

Publisher (CNA): MITRE · Vendor: jetty

Last updated 2026-06-16 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2007-02-07 11:28 UTCPublished CVE record published
2026-06-16 22:34 UTCUpdated Record last modified

jetty jetty http server DOWNGRADE

Affected: 4.2.9 · 4.2.11 · 4.2.12 · 4.2.14 · 4.2.15 · 4.2.16 · 4.2.17 · 4.2.18

Fixed in: no fixed release known

Safe to downgrade to: a release before 4.2.9

1. Check installed version

apt-cache policy jetty-http-server || rpm -q jetty-http-server || jetty-http-server --version

2. No fixed release: DOWNGRADE to a release before 4.2.9 (Debian / Ubuntu)

apt-cache madison jetty-http-server sudo apt install jetty-http-server=<VERSION_BEFORE_4.2.9> sudo apt-mark hold jetty-http-server

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list jetty-http-server sudo dnf downgrade jetty-http-server-<VERSION_BEFORE_4.2.9> sudo dnf versionlock add jetty-http-server

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

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-2006-6969?

jetty http server: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2006-6969 being exploited?

CVE-2006-6969 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-2006-6969 affect?

CVE-2006-6969 affects jetty http server. Severity is medium (CVSS 6.8). Jetty before 4.2.27, 5.1 before 5.1.12, 6.0 before 6.0.2, and 6.1 before 6.1.0pre3 generates predictable session identifiers using java.util.random, which makes it easier for remote attackers to guess a session identifier through brute forc

How urgent is CVE-2006-6969?

Priority 43/100. No elevated risk signals yet.

Software pages

Java vulnerabilities

Related CVEs

CVE-2004-2478 HIGH 7.5 UPGRADE UPGRADE Unspecified vulnerability in Jetty HTTP Server, as used in (1) IBM Trading Partner Interchange before 4.2.4, (
CVE-2004-2381 MEDIUM 5.0 DOWNGRADE HttpRequest.java in Jetty HTTP Server before 4.2.19 allows remote attackers to cause denial of service (memory
CVE-2002-1178 MEDIUM 5.0 UPGRADE Directory traversal vulnerability in the CGIServlet for Jetty HTTP server before 4.1.0 allows remote attackers

References

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