{"answers":{"affected":"","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40875 exists.","fix":"No fix has been published for CVE-2026-40875 yet. Limit exposure of the affected software until one is available.","what":"CVE-2026-40875 is a high-severity cross-site scripting vulnerability in mailcow-dockerized, published on 21 Apr 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-2026-40875 and fix it if it is affected.\n\nWhat it is: CVE-2026-40875 is a high-severity cross-site scripting vulnerability in mailcow-dockerized, published on 21 Apr 2026. Any signed-in user can exploit it over the network, 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-2026-40875 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-2026-40875/ (Markdown: https://insights.sbomify.com/CVE-2026-40875/index.md)","id":"CVE-2026-40875","markdown":"https://insights.sbomify.com/CVE-2026-40875/index.md","name":"CVE-2026-40875","record":{"aliases":["GHSA-jprq-w83q-q62h"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"mailcow email suite","requires_auth":"low_privilege","summary":"Attackers can inject scripts into login history via X-Real-IP header, enabling account takeover and email access through CSRF.","user_interaction":"required","vuln_class":"xss"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[],"cvss":{"score":7,"severity":"high","source":"cna","vector":"CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:P/VC:H/VI:N/VA:N/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 user dashboard's \"Seen successful connections\" (login history) renders the client IP from login logs without HTML escaping. Because the server trusts the X-Real-IP header as the source IP for logging, an attacker can inject HTML/JS into this field. This Self-XSS can be exploited by a Login CSRF to force the victim into the attacker's account, and then read emails in a previous browser tab. 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 user login history real_rip","id":"CVE-2026-40875","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":null,"product":null,"products":[],"type":"xss","year":"2026"},"n_packages":0,"n_references":1,"next":{"headline":"SFTP root escape via prefix-based path validation in goshs","id":"CVE-2026-40876"},"packages":[],"prev":{"headline":"mailcow: dockerized missing authorization on Forwarding Hosts delete action","id":"CVE-2026-40874"},"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":"no","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-21","vendors":["mailcow"]},"summary":"Attackers can inject scripts into login history via X-Real-IP header, enabling account takeover and email access through CSRF.","url":"https://insights.sbomify.com/CVE-2026-40875/"}