{"items":[{"id":"NVI-00016333","kind":"vulnerability","title":"Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection","revision":2,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected.","NVD lastModified does not establish freshness of every associated CPE record."],"lifecycle":"active","identifiers":["GHSA-w878-pj84-3j5v","CVE-2026-67445"],"plain_summary":"GitHub lists this reviewed advisory for github.com/axllent/mailpit. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-35112355af91e01e816f38dde8ae64c1"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-02T23:42:25.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-68a3d9f8fb2d0ef94944f1a965f2a3b3"},{"kind":"CVSS","as_of":"2026-10-18T20:10:00.110Z","value":"5.3 MEDIUM (3.1)","meaning":"security-advisories@github.com severity; no combined Null risk score.","source_id":"sr-35112355af91e01e816f38dde8ae64c1"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-68a3d9f8fb2d0ef94944f1a965f2a3b3","url":"https://github.com/advisories/GHSA-w878-pj84-3j5v","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w878-pj84-3j5v","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:29.477Z"},{"id":"sr-35112355af91e01e816f38dde8ae64c1","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67445","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-67445","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T15:07:43.109Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-68a3d9f8fb2d0ef94944f1a965f2a3b3"],"technology":"github.com/axllent/mailpit","known_exclusions":[],"conditions_summary":"## Summary\n\nMailpit's SMTP server reads each command line with an unbounded `bufio.Reader.ReadString('\\n')` before parsing the command or enforcing any protocol length limit. A remote SMTP client can send an oversized single command line and force Mailpit to allocate attacker-controlled memory before the server returns a syntax error or times out, even though RFC 5321 limits SMTP command lines to 512 octets including CRLF.\n\n## Technical Details\n\nMailpit enables SMTP by default. `config/config.go` sets `SMTPListen = \"[::]:1025\"`, and `cmd/root.go` calls `smtpd.Listen()` during normal startup. The SMTP server configures recipient and message DATA size limits in `internal/smtpd/main.go`, including the default 50 MiB `MaxMessageSize`, but those limits do not apply to command lines.\n\nThe vulnerable path is in the SMTP command loop. `internal/smtpd/smtpd.go` calls `s.readLine()` for every command before parsing the verb or arguments:\n\n```go\nline, err := s.readLine()\nif err != nil {\n    if netErr, ok := err.(net.Error); ok && netErr.Timeout() {\n        s.writef(\"421 4.4.2 %s %s ESMTP Service closing transmission channel after timeout exceeded\", s.srv.Hostname, s.srv.AppName)\n    }\n    bre","public_affected_ranges":["<= 1.30.3"]}],"null_published_at":"2026-11-08T19:53:44.048Z","source_updated_at":"2026-09-02T23:42:25.000Z","source_disclosed_at":"2026-09-02T23:42:25.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"Source facts changed; compare the preserved prior revision.","null_first_observed_at":"2026-11-02T02:21:29.477Z"},{"id":"NVI-00016333","kind":"vulnerability","title":"Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-w878-pj84-3j5v","CVE-2026-67445"],"plain_summary":"GitHub lists this reviewed advisory for github.com/axllent/mailpit. Published version ranges and source prerequisites are shown below; this is not an inspection of a visitor’s application.","review_status":"source_listed","control_topics":[],"public_actions":[{"summary":"Identify the exact component and deployed version, examine the linked publisher’s conditions, and retain evidence of any mitigation.","source_ids":["sr-68a3d9f8fb2d0ef94944f1a965f2a3b3"],"action_type":"investigate","limitations":"Confirm current vendor support, compatibility and deployment evidence. This report has not tested a fix in your system.","current_supported_target":null}],"schema_version":"1.1.0","source_metrics":[{"kind":"CVSS","as_of":"2026-09-02T23:42:25.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-68a3d9f8fb2d0ef94944f1a965f2a3b3"}],"why_it_matters":"Published affected context helps an owner decide what evidence to gather. This report has not examined your application.","related_sources":[{"id":"sr-68a3d9f8fb2d0ef94944f1a965f2a3b3","url":"https://github.com/advisories/GHSA-w878-pj84-3j5v","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-w878-pj84-3j5v","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:29.477Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-68a3d9f8fb2d0ef94944f1a965f2a3b3"],"technology":"github.com/axllent/mailpit","known_exclusions":[],"conditions_summary":"## Summary\n\nMailpit's SMTP server reads each command line with an unbounded `bufio.Reader.ReadString('\\n')` before parsing the command or enforcing any protocol length limit. A remote SMTP client can send an oversized single command line and force Mailpit to allocate attacker-controlled memory before the server returns a syntax error or times out, even though RFC 5321 limits SMTP command lines to 512 octets including CRLF.\n\n## Technical Details\n\nMailpit enables SMTP by default. `config/config.go` sets `SMTPListen = \"[::]:1025\"`, and `cmd/root.go` calls `smtpd.Listen()` during normal startup. The SMTP server configures recipient and message DATA size limits in `internal/smtpd/main.go`, including the default 50 MiB `MaxMessageSize`, but those limits do not apply to command lines.\n\nThe vulnerable path is in the SMTP command loop. `internal/smtpd/smtpd.go` calls `s.readLine()` for every command before parsing the verb or arguments:\n\n```go\nline, err := s.readLine()\nif err != nil {\n    if netErr, ok := err.(net.Error); ok && netErr.Timeout() {\n        s.writef(\"421 4.4.2 %s %s ESMTP Service closing transmission channel after timeout exceeded\", s.srv.Hostname, s.srv.AppName)\n    }\n    bre","public_affected_ranges":["<= 1.30.3"]}],"null_published_at":"2026-11-04T10:04:27.933Z","source_updated_at":"2026-09-02T23:42:25.000Z","source_disclosed_at":"2026-09-02T23:42:25.000Z","is_synthetic_fixture":false,"null_last_reviewed_at":null,"public_change_summary":"First indexed by Null; source disclosure date is shown separately.","null_first_observed_at":"2026-11-02T02:21:29.477Z"}],"next_cursor":null,"snapshot_revision":"42594"}