CVE-2026-84651
Description
A flaw was found in Jenkins. The system's application programming interface (API) and command-line interface (CLI) for managing agent configurations fail to properly validate the target agent. This vulnerability allows an attacker, who already has permissions to configure one agent, to overwrite the configuration of a different agent by manipulating the submitted data. Successful exploitation can lead to privilege escalation, granting the attacker control over the targeted agent's settings and access to sensitive information like its secret keys and environment variables.
Statement
A flaw was found in Jenkins. Privilege escalation is possible via agent configuration overwrite, allowing users with Agent/Configure permission to overwrite a different agent's configuration by manipulating the agent name in submitted XML. This issue affects Jenkins versions up to 2.579 (weekly) and up to 2.568.2 (LTS).
Mitigation
Update to Jenkins 2.580 (weekly) or Jenkins LTS 2.568.3 or later.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 8.1 | N/A | 6.3 |
| Attack Vector | Network | N/A | Network |
| Attack Complexity | Low | N/A | Low |
| Privileges Required | Low | N/A | Low |
| User Interaction | None | N/A | None |
| Scope | Unchanged | N/A | Unchanged |
| Confidentiality | High | N/A | Low |
| Integrity Impact | High | N/A | Low |
| Availability Impact | None | N/A | Low |
Vector
Red Hat: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
cve.org: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
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