{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40872 exists.","fix":"No fix has been published for CVE-2026-40872 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-40872 is a critical cross-site scripting vulnerability in mailcow-dockerized, published on 21 Apr 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-2026-40872 and fix it if it is affected.\n\nWhat it is: CVE-2026-40872 is a critical cross-site scripting vulnerability in mailcow-dockerized, published on 21 Apr 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40872 exists.\n\nAffected product: mailcow-dockerized. 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-2026-40872/ (Markdown: https://insights.sbomify.com/CVE-2026-40872/index.md)","id":"CVE-2026-40872","markdown":"https://insights.sbomify.com/CVE-2026-40872/index.md","name":"CVE-2026-40872","record":{"aliases":["GHSA-f9xf-vc72-rcgm"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["code_execution","account_takeover"],"network_reachable":"yes","non_default_config":false,"product_category":"mailcow email suite","requires_auth":"none","summary":"Attackers can inject malicious scripts into Autodiscover logs via unauthenticated requests, leading to code execution when admins view the logs.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":9.3,"severity":"critical","source":"cna","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:H/SI:H/SA:N","version":"4.0"},"cwes":[{"id":"CWE-80","name":"Improper Neutralization of Script-Related HTML Tags in a Web Page"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation"}],"description":"mailcow: dockerized is an open source groupware/email suite based on docker. In versions prior to 2026-03b, the admin dashboard's Autodiscover logs render the EMailAddress value (logged as the \"user\" field) without HTML escaping. By submitting an unauthenticated Autodiscover request with a crafted EMailAddress containing HTML/JS, the payload is stored in Redis and executed when an admin views the Autodiscover logs. Version 2026-03b fixes the vulnerability.","ecosystems":[],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":false,"headline":"mailcow: dockerized vulnerable to stored XSS in autodiscover logs email address field","id":"CVE-2026-40872","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"mailcow: dockerized vulnerable to stored XSS in Quarantine attachment filenames","id":"CVE-2026-40873"},"packages":[],"prev":{"headline":"mailcow: dockerized vulnerable to Second Order SQL Injection in quarantine category via API","id":"CVE-2026-40871"},"products":["mailcow-dockerized"],"published":"2026-04-21","related":[],"sources":[{"class":"attribution","licence":"CVE Terms of Use (MITRE)","name":"CVE List","prefix":"CVE"},{"class":"attribution","licence":"CWE Terms of Use","name":"CWE (MITRE)"},{"class":"attribution","licence":"FIRST CVSS licence","name":"CVSS (FIRST)"}],"ssvc":{"automatable":"yes","exploitation":"poc","technical_impact":"total"},"state":"PUBLISHED","updated":"2026-04-22","vendors":["mailcow"]},"summary":"Attackers can inject malicious scripts into Autodiscover logs via unauthenticated requests, leading to code execution when admins view the logs.","url":"https://insights.sbomify.com/CVE-2026-40872/"}