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CVE-2006-6969 — jetty-server

Fix: jetty-project/codehaus-jetty6@36f81d2

CVE-2006-6969 is a security vulnerability in org.eclipse.jetty:jetty-server. A fix is available for org.eclipse.jetty:jetty-server — see the affected versions and patch details below.

Jetty Uses Predictable Session Identifiers

Published
Updated
Affected
4 pkgs
Patched
4 / 4
Exploits
None indexed
Exploitation data as of Nov 6, 2026 · OSV.dev, NVD, FIRST.org (EPSS)

EPSS Exploitation Probability

via FIRST.org ↗
1.6%probability of exploitation in next 30 days
Lower Risk+0.01%
Lower risk than most CVEs76th percentile — riskier than 76% of all scored CVEsHighest risk
0.19%0.84%1.48%2.12%0.7%1.6%May 26Sep 26Nov 26

Probability of exploitation in the next 30 days, from FIRST.org EPSS.

Real-World Exposure

4 pkgs affected
☕org.eclipse.jetty:jetty-server☕org.eclipse.jetty:jetty-server☕org.eclipse.jetty:jetty-server☕org.eclipse.jetty:jetty-server

Real-time download stats are indexed for npm and PyPI packages. This vulnerability affects Maven packages — download data is not available via public APIs for these ecosystems.

Description

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.

Affected Packages

4 total 4 fixed
EcosystemPackageVulnerable rangeFix
☕Mavenorg.eclipse.jetty:jetty-serverall versions4.2.27org.eclipse.jetty:jetty-server:4.2.27
☕Mavenorg.eclipse.jetty:jetty-server≥ 5.1.0&&< 5.1.125.1.12org.eclipse.jetty:jetty-server:5.1.12
☕Mavenorg.eclipse.jetty:jetty-server≥ 6.0.0&&< 6.0.26.0.2org.eclipse.jetty:jetty-server:6.0.2
☕Mavenorg.eclipse.jetty:jetty-server≥ 6.1.0pre1&&< 6.1.0pre36.1.0pre3org.eclipse.jetty:jetty-server:6.1.0pre3

Affected Products

1 product · 13 configurations
Application
jetty http serverjetty
13 versions
4.2.94.2.114.2.124.2.144.2.154.2.164.2.174.2.184.2.194.2.245.1.116.0.1

Detection & mitigation playbook

Open-source dependency
  1. Detect

    Scan your dependency tree (package-lock.json, pnpm-lock.yaml, requirements.txt, go.sum, etc.) for org.eclipse.jetty:jetty-server, including transitive dependencies — a direct dependency you never call can still pull in a vulnerable version.

  2. Fix

    Update org.eclipse.jetty:jetty-server to 4.2.27 or later, then make sure no transitive (indirect) dependency still pins the vulnerable range — O3 confirms CVE-2006-6969 is resolved across your whole dependency graph.

  3. Workarounds

    If you can't upgrade right away: gate or disable the affected feature, validate untrusted input at the boundary, and avoid passing attacker-controlled data into the vulnerable path. O3's runtime protection blocks exploitation in production as an interim safeguard until the upgrade lands.

Frequently Asked Questions

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.
O3 Security · Impact-Aware SCA

Is CVE-2006-6969 in your dependencies?

Find it across Maven, including transitive dependencies.

CVE-2006-6969: jetty-server CSRF — Fixed in 4.2.27