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CVE-2016-9299

93
FAUCET Score

CVE-2016-9299 is a critical remote code execution vulnerability affecting Jenkins versions before 2.32 and LTS before 2.19.3, as well as Fedora Project's Jenkins packages. This flaw allows unauthenticated attackers to execute arbitrary code by sending a specially crafted serialized Java object, triggering an LDAP query to a third-party server. With a CVSS score of 9.8 (CRITICAL) and an EPSS score indicating high exploitability, this vulnerability poses a significant risk due to its network-based attack vector, low attack complexity, and complete compromise potential (confidentiality, integrity, availability). While not on the CISA KEV list, exploit modules are readily available in Metasploit and Nuclei, and it has garnered significant community discussion, indicating awareness and potential for exploitation.

Impacted Technologies

VendorProductVersion(s)CPE
<= 2.19.2CPE matchmatch criteria
cpe:2.3:a:jenkins:jenkins:*:*:*:*:lts:*:*:*
<= 2.31CPE matchmatch criteria
cpe:2.3:a:jenkins:jenkins:*:*:*:*:-:*:*:*
25CPE matchmatch criteria
cpe:2.3:o:fedoraproject:fedora:25:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.0

9.8CRITICAL

CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
Exploitability Score
3.9
Impact Score
5.9
CvssVersion
3.0

Exploit Intelligence

EPSS Score
96.94%
Probability of exploitation in next 30 days
EPSS Percentile
99.9%
Percentile rank of EPSS score among Peer Group
As of 2026-07-24
Model: v2026.06.15
Metasploit: Jenkins CLI HTTP Java Deserialization Vulnerability · Nov 16, 2016
Nuclei: CVE-2016-9299 · Oct 23, 2024
ExploitDB: EDB-44642 · May 17, 2018
This CVE's current EPSS score of 0.9694 is in the 99th percentile among its peer group of 36,829 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.1 Reddit, 0.3 Bluesky, 0.3 Mastodon, and 2.4 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.3 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (4)

mavenpatch availablevia ghsa
Product: org.jenkins-ci.main:jenkins-coreFixed in: 2.32
mavenpatch availablevia ghsa
Product: org.jenkins-ci.main:jenkins-coreFixed in: 2.19.3
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Enterprise 2Fixed in: jenkins
redhatvendor investigatingvia redhat_api
Product: Red Hat OpenShift Enterprise 3Fixed in: jenkins

Vendor Advisories (2)

mavenGHSA-2x9h-h3c4-wqqhcritical

Improper Neutralization of Special Elements used in an LDAP Query in Jenkins

May 14, 2022
redhatCVE-2016-9299Important

jenkins: Java deserialization flaw leads to RCE

Nov 11, 2016

References

groups.google.com / forum
groups.google.com / forum
lists.fedoraproject.org / archives/list/package-announce%40lists.fedoraproject.org/message/ZW2KUKYLNLVDB7STLHLYALCUFLEGCRM6
wiki.jenkins-ci.org / display/SECURITY/Jenkins+Security+Advisory+2016-11-16
Vendor Advisory
cloudbees.com / jenkins-security-advisory-2016-11-16
Vendor Advisory
exploit-db.com / exploits/44642
Third Party AdvisoryVDB Entry
openwall.com / lists/oss-security/2016/11/12/4
Mailing ListThird Party Advisory
openwall.com / lists/oss-security/2016/11/14/9
Mailing ListThird Party Advisory
securityfocus.com / bid/94281
Third Party AdvisoryVDB Entry
slideshare.net / codewhitesec/java-deserialization-vulnerabilities-the-forgotten-bug-class-deepsec-edition
Third Party Advisory