{"answers":{"affected":"It affects 1 product.","exploited":"There is no known exploitation of CVE-2026-100263 in the wild and no public exploit code.","fix":"No fix has been published for CVE-2026-100263 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-100263 is a medium-severity cross-site scripting vulnerability in Jetbrains Youtrack, published on 30 Sep 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-2026-100263 and fix it if it is affected.\n\nWhat it is: CVE-2026-100263 is a medium-severity cross-site scripting vulnerability in Jetbrains Youtrack, published on 30 Sep 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-2026-100263 in the wild and no public exploit code.\n\nAffected product: Jetbrains Youtrack. No package-level version data is available, so check the vendor advisory linked from the reference page.\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-2026-100263/ (Markdown: https://insights.sbomify.com/CVE-2026-100263/index.md)","id":"CVE-2026-100263","markdown":"https://insights.sbomify.com/CVE-2026-100263/index.md","name":"CVE-2026-100263","record":{"aliases":["GHSA-wpxv-jj6h-wjr5"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"JetBrains YouTrack","requires_auth":"none","summary":"Attackers can inject malicious HTML via the User-Agent header in JetBrains YouTrack, potentially leading to script execution or account takeover.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"JetBrains","cpe":[{"product":"youtrack","vendor":"jetbrains"}],"cvss":{"score":4.7,"severity":"medium","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:N/A:N","version":"3.1"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"In JetBrains YouTrack before 2026.2.18991 stored HTML injection via the User-Agent header was possible","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"none_known"},"has_fix":null,"headline":"Cross-site scripting in YouTrack","id":"CVE-2026-100263","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":"jetbrains:youtrack","products":["jetbrains:youtrack"],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"Information disclosure in YouTrack","id":"CVE-2026-100264"},"packages":[],"prev":{"headline":"Missing authorization in YouTrack","id":"CVE-2026-100262"},"products":["YouTrack"],"published":"2026-09-30","related":[{"cvss_score":10,"headline":"Auth bypass in YouTrack","id":"CVE-2026-62422","kev_date_added":null,"published":"2026-07-14"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2022-24442","kev_date_added":null,"published":"2022-02-25"},{"cvss_score":9.8,"headline":"Other in n/a","id":"CVE-2021-43185","kev_date_added":null,"published":"2021-11-09"},{"cvss_score":9.8,"headline":"Code injection in n/a","id":"CVE-2021-25770","kev_date_added":null,"published":"2021-02-03"},{"cvss_score":9.8,"headline":"SQL injection in n/a","id":"CVE-2019-12850","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":9.8,"headline":"Server-side request forgery in n/a","id":"CVE-2019-12852","kev_date_added":null,"published":"2019-07-03"},{"cvss_score":9.8,"headline":"Missing authorization in n/a","id":"CVE-2019-12866","kev_date_added":null,"published":"2019-07-03"}],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"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":"2026-09-30","vendors":["JetBrains"]},"summary":"Attackers can inject malicious HTML via the User-Agent header in JetBrains YouTrack, potentially leading to script execution or account takeover.","url":"https://insights.sbomify.com/CVE-2026-100263/"}