Deserialization Vulnerability in Jenkins by CloudBees
CVE-2026-84650

8.8HIGH

Key Information:

Vendor

Jenkins
Status
Jenkins
Vendor
CVE Published:
2 September 2026

What is CVE-2026-84650?

In specific versions of Jenkins, transient fields are not excluded from deserialization processes. This oversight allows attackers to manipulate configuration updates by submitting values for transient fields. The impact of this vulnerability varies based on the usage of these fields, posing potential risks to system integrity and security.

Affected Version(s)

Jenkins 2.580

Jenkins 2.580

Jenkins 2.568.3 < 2.568.*

References

https://www.jenkins.io/security/advisory/2026-09-02/#SECU...
vendor-advisory

CVSS V3.1

Score:
8.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.