{"answers":{"affected":"2 open source packages ship an affected version, including mantisbt/mantisbt.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40598 exists.","fix":"Upgrade mantisbt/mantisbt to 2.28.2 or later.","what":"CVE-2026-40598 is a medium-severity cross-site scripting vulnerability in mantisbt, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim."},"fix_prompt":"Check this codebase for CVE-2026-40598 and fix it if it is affected.\n\nWhat it is: CVE-2026-40598 is a medium-severity cross-site scripting vulnerability in mantisbt, published on 22 May 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.\nExploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40598 exists.\n\nAffected packages and fixed versions:\n- mantisbt/mantisbt (Packagist): affected all versions; fixed in 2.28.2\n- mantisbt/mantisbt (Packagist): affected all versions; fixed in 2.28.2\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-2026-40598/ (Markdown: https://insights.sbomify.com/CVE-2026-40598/index.md)","id":"CVE-2026-40598","markdown":"https://insights.sbomify.com/CVE-2026-40598/index.md","name":"CVE-2026-40598","record":{"aliases":["GHSA-6jh4-47v2-4g37"],"analysis":{"component_type":"web_application","fix_type":"upgrade","impacts":["code_execution"],"network_reachable":"yes","non_default_config":true,"product_category":"MantisBT issue tracker","requires_auth":"none","summary":"Attackers can inject HTML via the Referer header in MantisBT, potentially leading to cross-site scripting under specific server configurations.","user_interaction":"not_required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":6.9,"severity":"medium","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","version":"4.0"},"cwes":[{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"Mantis Bug Tracker (MantisBT) is an open source issue tracker. In versions 2.28.1 and below, improper escaping of the redirection page (retrieved from the request's Referer header) allows an attacker to inject HTML. While this is generally not directly actionable as modern browsers will URL-encode special characters, on some specific server configurations this could poison the cache, leading to cross-site scripting. This issue has been fixed in version 2.28.2.","ecosystems":["Packagist"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"MantisBT has Potential Referer-Based Reflected HTML Injection / XSS in Tag Update Page","id":"CVE-2026-40598","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Packagist","product":null,"products":[],"type":"xss","year":"2026"},"n_packages":2,"n_references":3,"next":{"headline":"ClearanceKit: Ad-hoc signed binaries can spoof Apple process identities in the global allowlist","id":"CVE-2026-40599"},"packages":[{"ecosystem":"Packagist","fixed":["2.28.2"],"introduced":["0"],"last_affected":[],"package":"mantisbt/mantisbt","purl":null,"source":"GHSA-6jh4-47v2-4g37"},{"ecosystem":"Packagist","fixed":["2.28.2"],"introduced":["0"],"last_affected":[],"package":"mantisbt/mantisbt","purl":"pkg:composer/mantisbt/mantisbt","source":"GHSA-6jh4-47v2-4g37"}],"prev":{"headline":"MantisBT has a Content Security Policy bypass via attachments","id":"CVE-2026-40597"},"products":["mantisbt"],"published":"2026-05-22","related":[],"sources":[{"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":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-05-23","vendors":["mantisbt"]},"summary":"Attackers can inject HTML via the Referer header in MantisBT, potentially leading to cross-site scripting under specific server configurations.","url":"https://insights.sbomify.com/CVE-2026-40598/"}