{"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-2026-53440 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-2026-53440 is a medium-severity vulnerability in Jenkins Jenkins, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-53440 and fix it if it is affected.\n\nWhat it is: CVE-2026-53440 is a medium-severity vulnerability in Jenkins Jenkins, published on 10 Jun 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-53440 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-2026-53440/ (Markdown: https://insights.sbomify.com/CVE-2026-53440/index.md)","id":"CVE-2026-53440","markdown":"https://insights.sbomify.com/CVE-2026-53440/index.md","name":"CVE-2026-53440","record":{"aliases":["BIT-jenkins-2026-53440","GHSA-92m7-4fpw-2wxm","MINI-54wg-42hp-2r68","MINI-86fc-pgm3-f88w","MINI-c4wv-99vp-52qf","MINI-cq6g-3f47-q9p7","MINI-gfpc-jg8w-w6v6","MINI-j9w7-wjw4-j5rx","MINI-qx7v-hfvf-m234"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["security_bypass"],"network_reachable":"yes","non_default_config":true,"product_category":"Jenkins automation server","requires_auth":"none","summary":"Attackers can redirect users to malicious domains after login in Jenkins, facilitating phishing attacks when the delegate security realm is used.","user_interaction":"required","vuln_class":"open_redirect"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jenkins","cpe":[{"product":"jenkins","vendor":"jenkins"}],"cvss":{"score":4.3,"severity":"medium","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-601","name":"URL Redirection to Untrusted Site"}],"description":"Jenkins 2.567 and earlier, LTS 2.555.2 and earlier does not ensure that the \"from\" parameter in the \"Delegate to servlet container\" security realm is safe to redirect to after login, allowing attackers to perform phishing attacks by redirecting users to an attacker-controlled domain.","ecosystems":["Bitnami","Maven"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":true,"headline":"Jenkins: Open Redirect phishing attacks possible via \"from\" parameter in \"Delegate to servlet container\"","id":"CVE-2026-53440","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"jenkins:jenkins","products":["jenkins:jenkins"],"type":"open_redirect","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Jenkins: Stored XSS vulnerability in node offline cause description","id":"CVE-2026-53441"},"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-2026-53440"},{"ecosystem":"Maven","fixed":["2.555.3"],"introduced":["0"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-92m7-4fpw-2wxm"},{"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-92m7-4fpw-2wxm"},{"ecosystem":"Maven","fixed":["2.568"],"introduced":["2.556"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-92m7-4fpw-2wxm"},{"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-92m7-4fpw-2wxm"}],"prev":{"headline":"Jenkins exposes other users' timezone and view names to users with Overall/Read permission","id":"CVE-2026-53439"},"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)"}],"ssvc":{"automatable":"no","exploitation":"none","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-06-10","vendors":["Jenkins Project"]},"summary":"Attackers can redirect users to malicious domains after login in Jenkins, facilitating phishing attacks when the delegate security realm is used.","url":"https://insights.sbomify.com/CVE-2026-53440/"}