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Jenkins published a security advisory covering multiple vulnerabilities in widely used plugins, with fixes released for affected versions. The disclosed issues span missing permission checks, unsafe deserialization, stored cross-site scripting, and an open redirect, affecting plugins including Script Security, Credentials Binding, Matrix Authorization Strategy, GitHub Branch Source, GitHub, HTML Publisher, and Microsoft Entra ID.
The most serious issue is an arbitrary file write flaw that can lead to remote code execution, while other bugs could let attackers abuse low-privilege access such as Overall/Read, Item/Configure, or the ability to supply credentials to a job. Jenkins said the advisory includes severity ratings, attribution, and patched plugin versions, and urged administrators to update impacted plugins to the fixed releases.
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Jenkins published its 2026-04-29 security advisory disclosing multiple vulnerabilities in several plugins, including missing permission checks, arbitrary file write leading to possible remote code execution, unsafe deserialization, stored cross-site scripting, and an open redirect. Fixed versions were released for affected plugins including Script Security, Credentials Binding, Matrix Authorization Strategy, GitHub Branch Source, GitHub, HTML Publisher, and Microsoft Entra ID.
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Jenkins released security updates for multiple plugins, including **Active Directory**, **LDAP**, **AppSpider**, **Bitbucket OAuth**, **Credentials Binding**, **Email Extension**, **GitHub Integration**, **Job Import**, **Multijob**, and **Pipeline: Groovy Libraries**. The most severe issues affect the **LDAP** and **Active Directory** plugins, which could follow LDAP referrals to attacker-controlled RMI URLs and trigger deserialization on the Jenkins controller, creating a potential path to remote code execution under certain conditions. The advisory also addressed a range of additional plugin vulnerabilities, including arbitrary file read, arbitrary file write that could enable code execution, phishing through an open redirect, CSRF-triggered actions, credential ID enumeration, and SSRF-like outbound connections. Jenkins separately disclosed a **stored XSS** flaw in the `buildgraph-view` plugin that remained unresolved at publication time, leaving users without an available fix for that issue.
Jun 29, 2026
Jenkins has released fixes in **Jenkins 2.568** and **Jenkins LTS 2.555.3** for multiple vulnerabilities affecting the automation server, including a high-impact unsafe deserialization flaw tracked as **`CVE-2026-53435`**. According to the disclosure, attackers with **Overall/Read** permission and additional access such as a valid user account or the ability to post `config.xml` data could trigger deserialization of Jenkins core or plugin types, potentially leading to **user impersonation, arbitrary HTTP requests, possible Script Console code execution, and arbitrary file reads** from the Jenkins controller. The issues affect **Jenkins 2.567 and earlier** and **Jenkins LTS 2.555.2 and earlier**. The advisory also addresses several additional weaknesses, including **open redirect** bugs in the login flow, a **missing permission check** in HTTP endpoints, an **unsafe redirect** in the "Delegate to servlet container" security realm, a **stored XSS** issue through offline cause descriptions, and exposure of **plaintext secrets** through `config.xml` handling. Organizations running self-managed Jenkins instances should prioritize upgrading to the fixed releases and review controller exposure, user permissions, and configuration handling paths that could allow low-privileged users to reach sensitive functionality.
Jun 29, 2026
Jenkins has disclosed multiple security vulnerabilities affecting several of its plugins, including a critical authentication bypass in the SAML Plugin (CVE-2025-64131). The official security advisory lists affected plugins such as SAML, MCP Server, Extensible Choice Parameter, JDepend, Eggplant Runner, Themis, Start Windocks Containers, azure-cli, Nexus Task Runner, OpenShift Pipeline, ByteGuard Build Actions, Curseforge Publisher, and Publish to Bitbucket. Administrators are urged to review the advisory and apply the necessary updates to mitigate the risk of exploitation. The SAML Plugin flaw allows attackers to bypass authentication controls, potentially granting unauthorized access to Jenkins instances. Other plugin vulnerabilities may also expose systems to various risks if left unpatched. Security experts recommend immediate action to update all affected plugins to their latest versions to ensure the integrity and security of Jenkins environments.
Jul 9, 2026