Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes referenced by the `resolves-to` attribute during XStream deserialization.

The version of FreeBSD installed on the remote host is prior to tested version. It is, therefore, affected by multiple vulnerabilities as referenced in the bbad76d0-3b09-485d-bb13-28cbab009cbc advisory.

    Jenkins Security Advisory 2026-10-28:

Tenable has extracted the preceding description block directly from the FreeBSD security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

According to its its self-reported version number, the version of Jenkins running on the remote web server is Jenkins LTS prior to 2.580.2 or Jenkins weekly prior to 2.588. It is, therefore, affected by multiple vulnerabilities:

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not escape the text shown in the tooltips of     breadcrumb bar overflow menu entries, resulting in a stored cross-site scripting (XSS) vulnerability     exploitable by attackers with Overall/Read permission. (CVE-2026-117623)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier checks for symbolic links in the path of an extracted     file only before creating its parent directories, not immediately before writing it, and allows symbolic     links in artifacts to replace existing files or empty directories, allowing attackers with Item/Configure     permission to write files to arbitrary locations on the Jenkins controller file system. (CVE-2026-117617)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not apply its deserialization filter to classes     referenced by the `resolves-to` attribute during XStream deserialization. (CVE-2026-117612)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not restrict item types in collections after     deserialization, allowing attackers with access to POST config.xml API endpoints to submit crafted     `config.xml` files that can lead to, e.g., stored cross-site scripting (XSS) vulnerabilities.
    (CVE-2026-117613)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier converts the launch commands in older agent     configurations into launchers provided by the Command Agent Launcher Plugin without checking whether they     have been approved by an administrator, allowing attackers with Agent/Configure permission to execute     arbitrary code in the context of the Jenkins controller JVM. (CVE-2026-117614)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier follows symbolic links when copying the directory of an     item being renamed, allowing attackers with Item/Create and Item/Configure permission to read arbitrary     files on the Jenkins controller file system. (CVE-2026-117615)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier provides an HTTP endpoint that loads agents by name     without validating the name, allowing attackers with Overall/Read permission to load any config.xml file     on the controller file system as an agent configuration, and to overwrite an arbitrary config.xml file     when that agent is saved, potentially resulting in arbitrary code execution. (CVE-2026-117616)

  - In Jenkins 2.587 and earlier, LTS 2.580.1 and earlier, the HTTP endpoint for creating the first user     account does not check whether the setup wizard has been completed, resulting in a race condition that     allows unauthenticated attackers to create an administrator account while the initial user account is     being replaced. (CVE-2026-117618)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier allows requests authenticated using HTTP Basic     authentication, including with an API token, to obtain a remember me cookie, allowing attackers who have     obtained a user's API token to retain access to Jenkins using a remember me cookie after the API token     is revoked or expires. (CVE-2026-117619)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier allows attackers with Overall/Read permission to     trigger warnings in the Manage Old Data feature that can be acted on by administrators to inject     attacker-controlled data, overriding existing user account information, including login passwords.
    (CVE-2026-117620)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier computes on the agent the URL of the link shown in the     workspace browser for each file and directory, resulting in a cross-site scripting (XSS) vulnerability     exploitable by attackers in control of agent processes. (CVE-2026-117621)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier allows agents to send exceptions implementing the     Stapler HttpResponse interface to the controller, resulting in a cross-site scripting (XSS) vulnerability     exploitable by attackers in control of agent processes. (CVE-2026-117622)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier does not consistently enforce the restriction on     deserializing objects of types marked as storing their configuration in independent top-level     configuration files as nested values, allowing attackers to bypass the root element check and potentially     inject nested objects. (CVE-2026-117624)

  - A missing permission check in Jenkins 2.587 and earlier, LTS 2.580.1 and earlier allows attackers with     Overall/Read permission to obtain the server, port, user name, and no-proxy host list of the configured     HTTP proxy. (CVE-2026-117625)

  - Jenkins 2.587 and earlier, LTS 2.580.1 and earlier improperly identifies file paths attempting path     traversal in the file browser for workspaces and $JENKINS_HOME/userContent/, allowing attackers with     Overall/Read permission to obtain the names, sizes, and last modification times of files in the     $JENKINS_HOME, and attackers with Item/Workspace permission to obtain the names of jobs that have a     workspace on the same agent. (CVE-2026-117626)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

ID	Name	Product	Family	Type	Severity
373480	FreeBSD : jenkins -- multiple vulnerabilities (bbad76d0-3b09-485d-bb13-28cbab009cbc)	Nessus	FreeBSD Local Security Checks	Local	high
373229	Jenkins LTS < 2.580.2 / Jenkins weekly < 2.588 Multiple Vulnerabilities	Nessus	CGI abuses	Combined	high

Detections

Analytics

CVE-2026-117612

high

Tenable Plugins

high

high