{"answers":{"affected":"5 open source packages ship an affected version, including org.jenkins-ci.main:jenkins-core and jenkins. It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-53435 in the wild and no public exploit code.","fix":"Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.555.3 or 2.568.","what":"CVE-2026-53435 is a high-severity unsafe deserialization vulnerability in Jenkins Jenkins, published on 10 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-53435 and fix it if it is affected.\n\nWhat it is: CVE-2026-53435 is a high-severity unsafe deserialization vulnerability in Jenkins Jenkins, published on 10 Jun 2026. Any signed-in user can exploit it over the network, with no action from the victim.\nExploitation: There is no known exploitation of CVE-2026-53435 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.jenkins-ci.main:jenkins-core (Maven): affected all versions; fixed in 2.555.3\n- org.jenkins-ci.main:jenkins-core (Maven): affected all versions; fixed in 2.555.3\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.556; fixed in 2.568\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.556; fixed in 2.568\n- jenkins (Bitnami): affected all versions; fixed in 2.555.3, 2.568.0\n\nTask:\n1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.\n2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.\n3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.\n4. Run the tests and summarise what changed and why.\n5. If nothing in the project is affected, say so and change nothing.\n\nReference: https://insights.sbomify.com/CVE-2026-53435/ (Markdown: https://insights.sbomify.com/CVE-2026-53435/index.md)","id":"CVE-2026-53435","markdown":"https://insights.sbomify.com/CVE-2026-53435/index.md","name":"CVE-2026-53435","record":{"aliases":["BIT-jenkins-2026-53435","GHSA-g2xq-2v27-4rh3","MINI-5wfq-87mx-3vqx","MINI-6hj5-wf3w-47pw","MINI-jwg4-534j-7jj6","MINI-mjqf-9cjc-73hq","MINI-vv8m-87r3-w2pj","MINI-w45j-6w9g-f23g","MINI-xvvv-2r2q-388x"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Jenkins automation server","requires_auth":"low_privilege","summary":"Attackers can deserialize arbitrary types via config.xml to impersonate users, execute code, or read files on the Jenkins controller.","user_interaction":"not_required","vuln_class":"deserialization"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jenkins","cpe":[{"product":"jenkins","vendor":"jenkins"}],"cvss":{"score":8.8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-502","name":"Deserialization of Untrusted Data"}],"description":"In Jenkins 2.567 and earlier, LTS 2.555.2 and earlier, it is possible for attackers to have Jenkins deserialize arbitrary types defined in Jenkins core or plugins from an attacker-controlled `config.xml` submission in a way that allows them to handle HTTP requests afterwards.\nThis can be used to impersonate any user and send HTTP requests on their behalf, up to and including use of the Script Console to run arbitrary code, or to read arbitrary files from the Jenkins controller.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":"2026-06-12","github_poc":1,"max_poc_stars":11,"metasploit":0,"nuclei":0,"refs":[{"date":"2026-06-12T14:50:22Z","kind":"github_poc","ref":"https://github.com/AmesianX/CVE-2026-53435","stars":11,"title":"An offensive security researcher + an AI vs. a fresh n-day: building the first public PoC for CVE-2026-53435 in one Friday night. Raw 8h20m log inside."}],"tier":"poc_unverified"},"has_fix":true,"headline":"Jenkins arbitrary type deserialization from attacker-controlled config.xml allows remote code execution and user impersonation","id":"CVE-2026-53435","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"jenkins:jenkins","products":["jenkins:jenkins"],"type":"deserialization","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Jenkins Open Redirect via Relative Path Segments in Post-Login Redirect URL","id":"CVE-2026-53436"},"packages":[{"ecosystem":"Bitnami","fixed":["2.555.3","2.568.0"],"introduced":["0","2.556.0"],"last_affected":[],"package":"jenkins","purl":"pkg:bitnami/jenkins","source":"BIT-jenkins-2026-53435"},{"ecosystem":"Maven","fixed":["2.555.3"],"introduced":["0"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-g2xq-2v27-4rh3"},{"ecosystem":"Maven","fixed":["2.555.3"],"introduced":["0"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","source":"GHSA-g2xq-2v27-4rh3"},{"ecosystem":"Maven","fixed":["2.568"],"introduced":["2.556"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-g2xq-2v27-4rh3"},{"ecosystem":"Maven","fixed":["2.568"],"introduced":["2.556"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","source":"GHSA-g2xq-2v27-4rh3"}],"prev":{"headline":"Apache Tomcat: Invalid CRL configuration doesn't trigger failure for FFM Connector","id":"CVE-2026-53434"},"products":["Jenkins"],"published":"2026-06-10","related":[{"cvss_score":9.8,"headline":"Jenkins Command Line Interface (CLI) Path Traversal","id":"CVE-2024-23897","kev_date_added":"2024-08-19","published":"2024-01-24"},{"cvss_score":9.8,"headline":"Jenkins Stapler Web Framework Deserialization of Untrusted Data","id":"CVE-2018-1000861","kev_date_added":"2022-02-10","published":"2018-12-10"},{"cvss_score":9.8,"headline":"Jenkins Remote Code Execution","id":"CVE-2017-1000353","kev_date_added":"2025-10-02","published":"2018-01-29"},{"cvss_score":7.5,"headline":"Jenkins User Interface (UI) Information Disclosure","id":"CVE-2015-5317","kev_date_added":"2023-05-12","published":"2015-11-25"},{"cvss_score":9.8,"headline":"Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins","id":"CVE-2021-21690","kev_date_added":null,"published":"2021-11-04"},{"cvss_score":9.8,"headline":"Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins","id":"CVE-2021-21691","kev_date_added":null,"published":"2021-11-04"},{"cvss_score":9.8,"headline":"Multiple vulnerabilities allow bypassing path filtering of agent-to-controller access control in Jenkins","id":"CVE-2021-21692","kev_date_added":null,"published":"2021-11-04"}],"sources":[{"class":"attribution","licence":"Apache-2.0","name":"Bitnami","prefix":"BIT"},{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CC BY 4.0","name":"GitHub Advisory Database","prefix":"GHSA"},{"class":"attribution","licence":"US public information, NVD API terms","name":"NVD"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"},{"class":"open","licence":"CC0","name":"PoC-in-GitHub"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-09-09","vendors":["Jenkins Project"]},"summary":"Attackers can deserialize arbitrary types via config.xml to impersonate users, execute code, or read files on the Jenkins controller.","url":"https://insights.sbomify.com/CVE-2026-53435/"}