{"answers":{"affected":"3 open source packages ship an affected version, including github.com/foxcpp/maddy. It affects 1 product.","exploited":"It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-40193 exists.","fix":"Upgrade github.com/foxcpp/maddy to 0.9.3 or later.","what":"CVE-2026-40193 is a high-severity vulnerability in foxcpp maddy, published on 15 Apr 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-2026-40193 and fix it if it is affected.\n\nWhat it is: CVE-2026-40193 is a high-severity vulnerability in foxcpp maddy, published on 15 Apr 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-2026-40193 exists.\n\nAffected packages and fixed versions:\n- github.com/foxcpp/maddy (Go): affected all versions; fixed in 0.9.3\n- github.com/foxcpp/maddy (Go): affected all versions; fixed in 0.9.3\n- github.com/foxcpp/maddy (Go): affected all versions; fixed in 0.9.3\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-2026-40193/ (Markdown: https://insights.sbomify.com/CVE-2026-40193/index.md)","id":"CVE-2026-40193","markdown":"https://insights.sbomify.com/CVE-2026-40193/index.md","name":"CVE-2026-40193","record":{"aliases":["GHSA-5835-4gvc-32pc","GO-2026-5137"],"analysis":{"component_type":"server_software","fix_type":"upgrade","impacts":["account_takeover","data_read"],"network_reachable":"yes","non_default_config":false,"product_category":"Maddy Mail Server","requires_auth":"none","summary":"Attackers can inject LDAP filters via usernames to spoof identities, enumerate directories, and extract data from the Maddy Mail Server.","user_interaction":"not_required","vuln_class":"other"},"analysis_generated_by":"qwen3.8-flash-next","assigner":"GitHub_M","cpe":[{"product":"maddy","vendor":"maddy_project"}],"cvss":{"score":8.2,"severity":"high","source":"cna","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:L/A:N","version":"3.1"},"cwes":[{"id":"CWE-90","name":"Improper Neutralization of Special Elements used in an LDAP Query"}],"description":"maddy is a composable, all-in-one mail server. Versions prior to 0.9.3 contain an LDAP injection vulnerability in the auth.ldap module where user-supplied usernames are interpolated into LDAP search filters and DN strings via strings.ReplaceAll() without any LDAP filter escaping, despite the go-ldap/ldap/v3 library's ldap.EscapeFilter() function being available in the same import. This affects three code paths: the Lookup() filter, the AuthPlain() DN template, and the AuthPlain() filter. An attacker with network access to the SMTP submission or IMAP interface can inject arbitrary LDAP filter expressions through the username field in AUTH PLAIN or LOGIN commands. This enables identity spoofing by manipulating filter results to authenticate as another user, LDAP directory enumeration via wildcard filters, and blind extraction of LDAP attribute values using authentication responses as a boolean oracle or via timing side-channels between the two distinct failure paths. This issue has been fixed in version 0.9.3.","ecosystems":["Go"],"exploits":{"exploitdb":0,"first_seen":null,"github_poc":0,"max_poc_stars":null,"metasploit":0,"nuclei":0,"refs":[],"tier":"weaponised"},"has_fix":true,"headline":"Maddy Mail Server: LDAP Filter Injection via Unsanitized Username","id":"CVE-2026-40193","indexable":true,"kev":null,"kind":"cve","links":{"ecosystem":"Go","product":null,"products":[],"type":"other","year":"2026"},"n_packages":3,"n_references":3,"next":{"headline":"phpseclib has a variable-time HMAC comparison in SSH2::get_binary_packet() using != instead of hash_equals()","id":"CVE-2026-40194"},"packages":[{"ecosystem":"Go","fixed":["0.9.3"],"introduced":["0"],"last_affected":[],"package":"github.com/foxcpp/maddy","purl":null,"source":"GHSA-5835-4gvc-32pc"},{"ecosystem":"Go","fixed":["0.9.3"],"introduced":["0"],"last_affected":[],"package":"github.com/foxcpp/maddy","purl":"pkg:golang/github.com/foxcpp/maddy","source":"GHSA-5835-4gvc-32pc"},{"ecosystem":"Go","fixed":["0.9.3"],"introduced":["0"],"last_affected":[],"package":"github.com/foxcpp/maddy","purl":"pkg:golang/github.com/foxcpp/maddy","source":"GO-2026-5137"}],"prev":{"headline":"Pillow is vulnerable to a FITS GZIP decompression bomb","id":"CVE-2026-40192"},"products":["maddy"],"published":"2026-04-15","related":[{"cvss_score":9.1,"headline":"Full authentication bypass if SASL authorization username is specified","id":"CVE-2023-27582","kev_date_added":null,"published":"2023-03-13"},{"cvss_score":6.3,"headline":"Maddy Mail Server does not implement account expiry","id":"CVE-2022-24732","kev_date_added":null,"published":"2022-03-09"}],"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":"CC BY 4.0","name":"Go Vulnerability Database","prefix":"GO"},{"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":"yes","exploitation":"poc","technical_impact":"partial"},"state":"PUBLISHED","updated":"2026-04-16","vendors":["foxcpp"]},"summary":"Attackers can inject LDAP filters via usernames to spoof identities, enumerate directories, and extract data from the Maddy Mail Server.","url":"https://insights.sbomify.com/CVE-2026-40193/"}