{"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-2026-27099 in the wild and no public exploit code.","fix":"Upgrade org.jenkins-ci.main:jenkins-core to a fixed version for your release line: 2.541.2 or 2.551.","what":"CVE-2026-27099 is a high-severity cross-site scripting vulnerability in Jenkins Jenkins, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link."},"fix_prompt":"Check this codebase for CVE-2026-27099 and fix it if it is affected.\n\nWhat it is: CVE-2026-27099 is a high-severity cross-site scripting vulnerability in Jenkins Jenkins, published on 18 Feb 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.\nExploitation: There is no known exploitation of CVE-2026-27099 in the wild and no public exploit code.\n\nAffected packages and fixed versions:\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.483; fixed in 2.541.2\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.483; fixed in 2.541.2\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.542; fixed in 2.551\n- org.jenkins-ci.main:jenkins-core (Maven): affected from 2.542; fixed in 2.551\n- jenkins (Bitnami): affected from 2.483.0; fixed in 2.541.2, 2.551.0\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-2026-27099/ (Markdown: https://insights.sbomify.com/CVE-2026-27099/index.md)","id":"CVE-2026-27099","markdown":"https://insights.sbomify.com/CVE-2026-27099/index.md","name":"CVE-2026-27099","record":{"aliases":["BIT-jenkins-2026-27099","GHSA-85h6-5m3v-gx37","MINI-32fx-4rqj-fg3x","MINI-6x9m-wmr9-vpc3","MINI-9vvp-vqwm-cj8j","MINI-p94v-6qx3-mq7x","MINI-qv89-j92h-3r3h","MINI-xp22-25fc-94g6","ROOT-APP-MAVEN-CVE-2026-27099"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"Jenkins automation server","requires_auth":"low_privilege","summary":"Attackers with specific permissions can inject malicious scripts into Jenkins agent offline causes, leading to stored XSS and potential session hijacking.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"jenkins","cpe":[{"product":"jenkins","vendor":"jenkins"}],"cvss":{"score":8,"severity":"high","source":"cisa-adp","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:U/C:H/I:H/A:H","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Jenkins 2.483 through 2.550 (both inclusive), LTS 2.492.1 through 2.541.1 (both inclusive) does not escape the user-provided description of the \"Mark temporarily offline\" offline cause, resulting in a stored cross-site scripting (XSS) vulnerability exploitable by attackers with Agent/Configure or Agent/Disconnect permission.","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 has a stored XSS vulnerability in node offline cause description","id":"CVE-2026-27099","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Bitnami","product":"jenkins:jenkins","products":["jenkins:jenkins"],"type":"xss","year":"2026"},"n_packages":5,"n_references":1,"next":{"headline":"Jenkins has a build information disclosure vulnerability through Run Parameter","id":"CVE-2026-27100"},"packages":[{"ecosystem":"Bitnami","fixed":["2.541.2","2.551.0"],"introduced":["2.483.0","2.542.0"],"last_affected":[],"package":"jenkins","purl":"pkg:bitnami/jenkins","source":"BIT-jenkins-2026-27099"},{"ecosystem":"Maven","fixed":["2.541.2"],"introduced":["2.483"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-85h6-5m3v-gx37"},{"ecosystem":"Maven","fixed":["2.541.2"],"introduced":["2.483"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","source":"GHSA-85h6-5m3v-gx37"},{"ecosystem":"Maven","fixed":["2.551"],"introduced":["2.542"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":null,"source":"GHSA-85h6-5m3v-gx37"},{"ecosystem":"Maven","fixed":["2.551"],"introduced":["2.542"],"last_affected":[],"package":"org.jenkins-ci.main:jenkins-core","purl":"pkg:maven/org.jenkins-ci.main/jenkins-core","source":"GHSA-85h6-5m3v-gx37"}],"prev":{"headline":"WordPress Au Pair Agency - Babysitting \u0026 Nanny Theme theme \u003c= 1.2.2 - Deserialization of untrusted data vulnerability","id":"CVE-2026-27098"},"products":["Jenkins"],"published":"2026-02-18","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":"total"},"state":"PUBLISHED","updated":"2026-02-18","vendors":["Jenkins Project"]},"summary":"Attackers with specific permissions can inject malicious scripts into Jenkins agent offline causes, leading to stored XSS and potential session hijacking.","url":"https://insights.sbomify.com/CVE-2026-27099/"}