Jenkins RCE Flaw Exploited by Attackers in the Wild

Gbhackers •Divya • June 15, 2026

A remote code execution (RCE) vulnerability in Jenkins, tracked as CVE-2026-53435, is now actively exploited in the wild. The flaw, stemming from insecure deserialization during Jenkins’ config.xml processing, allows unauthenticated or low-privileged attackers to execute arbitrary code on vulnerable instances, posing a severe risk to organizations that rely on the popular CI/CD automation server. Jenkins RCE Flaw […]

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Critical RCE Vulnerability in Jenkins Exploited in the Wild A critical remote code execution (RCE) vulnerability, CVE-2026-53435, has been identified in Jenkins, affecting versions 2.567 and earlier, including LTS 2.555.2 and earlier. This flaw allows attackers to exploit insecure deserialization during the processing of an attacker-controlled config.xml file, enabling them to impersonate users and execute arbitrary code. The vulnerability is particularly dangerous as it can be exploited by unauthenticated or low-privileged users, posing a significant risk to organizations that utilize Jenkins for continuous integration and deployment. Active exploitation of this vulnerability has been confirmed, prompting urgent advisories for immediate patching. Organizations are advised to enhance their monitoring capabilities to detect any suspicious activity related to this vulnerability. The Centre for Cybersecurity Belgium has emphasized the need for swift action to mitigate potential impacts. 3 sources 76

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Jenkins RCE Flaw Exploited by Attackers in the Wild

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Extracted Entities

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