{"id":"CVE-2026-84697","summary":"Mailpit SSRF Deny List Bypass via Azure Metadata and IPv6 Prefix","details":"Mailpit's IsInternalIP deny list function fails to block the Azure WireServer address 168.63.129.16 and the RFC 2765/6145 IPv4-translated IPv6 prefix, allowing server-side request forgery to internal destinations. Attackers can supply hostnames resolving to these addresses in message content to reach the link check API and proxy endpoint for accessing internal resources.","modified":"2026-09-03T03:48:19.972222378Z","published":"2026-09-02T00:37:53.020Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84697.json","cna_assigner":"VulnCheck","cwe_ids":["CWE-918"]},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/84xxx/CVE-2026-84697.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-84697"},{"type":"ADVISORY","url":"https://www.vulncheck.com/advisories/mailpit-ssrf-deny-list-bypass-via-azure-metadata-and-ipv6-prefix"},{"type":"FIX","url":"https://github.com/axllent/mailpit/commit/a02821bf3424da9196e156c422370f4868a1dff2"},{"type":"PACKAGE","url":"https://github.com/axllent/mailpit"},{"type":"ARTICLE","url":"https://github.com/axllent/mailpit/blob/v1.31.0/internal/tools/net.go"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/axllent/mailpit","events":[{"introduced":"0"},{"fixed":"a02821bf3424da9196e156c422370f4868a1dff2"}],"database_specific":{"extracted_events":[{"introduced":"0"},{"last_affected":"1.31.0"}],"source":["AFFECTED_FIELD","REFERENCES"]}}],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-84697.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"}]}