{"items":[{"id":"NVI-00014115","kind":"vulnerability","title":"Mailpit: Thumbnail generation decodes unbounded image dimensions before scaling","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-75mr-qw9x-3r39","CVE-2026-67446"],"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-20d61569f94ce5bc0aefdf73469af5c4"],"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":"2026-09-02T23:39:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-4a51ef783bb873c1bcb5599842507160"},{"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-20d61569f94ce5bc0aefdf73469af5c4"}],"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-4a51ef783bb873c1bcb5599842507160","url":"https://github.com/advisories/GHSA-75mr-qw9x-3r39","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-75mr-qw9x-3r39","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:29.477Z"},{"id":"sr-20d61569f94ce5bc0aefdf73469af5c4","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-67446","basis":"official_catalog","notes":"This product uses data from the NVD API but is not endorsed or certified by the NVD.","title":"CVE-2026-67446","publisher":"NIST National Vulnerability Database","observed_at":"2026-11-08T15:07:43.109Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4a51ef783bb873c1bcb5599842507160"],"technology":"github.com/axllent/mailpit","known_exclusions":[],"conditions_summary":"## Summary\n\nMailpit's thumbnail endpoint decodes attacker-supplied image attachments into a full raster before checking any decoded-pixel, dimension, or memory budget. A remote client that can store an email and reach the default web API can supply a compact high-dimension image, then request `/api/v1/message/{id}/part/{partID}/thumb` to force server-side memory and CPU work far larger than the encoded attachment size before Mailpit returns a 180x120 thumbnail.\n\n## Technical Details\n\nThe route is registered as `GET /api/v1/message/{id}/part/{partID}/thumb` in `server/server.go`. The handler in `server/apiv1/thumbnails.go` loads the requested attachment and accepts any part whose content type begins with `image/`:\n\n```go\na, err := storage.GetAttachmentPart(id, partID)\n// ...\nif !strings.HasPrefix(a.ContentType, \"image/\") {\n    blankImage(a, w)\n    return\n}\n\nbuf := bytes.NewBuffer(a.Content)\nimg, err := imaging.Decode(buf, imaging.AutoOrientation(true))\n```\n\n`storage.GetAttachmentPart()` reparses the stored raw email and returns the matching attacker-supplied attachment bytes. `Thumbnail()` then calls `imaging.Decode()` before any check on declared dimensions or estimated decoded byt","public_affected_ranges":["<= 1.30.3"]}],"null_published_at":"2026-11-08T19:53:44.037Z","source_updated_at":"2026-09-02T23:39:09.000Z","source_disclosed_at":"2026-09-02T23:39:08.000Z","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-00014115","kind":"vulnerability","title":"Mailpit: Thumbnail generation decodes unbounded image dimensions before scaling","revision":1,"unknowns":["Customer inventory, deployment, reachability and exploitation have not been inspected."],"lifecycle":"active","identifiers":["GHSA-75mr-qw9x-3r39","CVE-2026-67446"],"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-4a51ef783bb873c1bcb5599842507160"],"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":"2026-09-02T23:39:09.000Z","value":"7.5 high","meaning":"GitHub source severity; exploitability and local consequence require separate evidence.","source_id":"sr-4a51ef783bb873c1bcb5599842507160"}],"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-4a51ef783bb873c1bcb5599842507160","url":"https://github.com/advisories/GHSA-75mr-qw9x-3r39","basis":"vendor_advisory","notes":"GitHub Advisory Database; CC-BY-4.0. Each advisory links its original attribution. Null normalizes fields.","title":"GHSA-75mr-qw9x-3r39","publisher":"GitHub Advisory Database","observed_at":"2026-11-02T02:21:29.477Z"}],"affected_context":[{"certainty":"source_listed","source_ids":["sr-4a51ef783bb873c1bcb5599842507160"],"technology":"github.com/axllent/mailpit","known_exclusions":[],"conditions_summary":"## Summary\n\nMailpit's thumbnail endpoint decodes attacker-supplied image attachments into a full raster before checking any decoded-pixel, dimension, or memory budget. A remote client that can store an email and reach the default web API can supply a compact high-dimension image, then request `/api/v1/message/{id}/part/{partID}/thumb` to force server-side memory and CPU work far larger than the encoded attachment size before Mailpit returns a 180x120 thumbnail.\n\n## Technical Details\n\nThe route is registered as `GET /api/v1/message/{id}/part/{partID}/thumb` in `server/server.go`. The handler in `server/apiv1/thumbnails.go` loads the requested attachment and accepts any part whose content type begins with `image/`:\n\n```go\na, err := storage.GetAttachmentPart(id, partID)\n// ...\nif !strings.HasPrefix(a.ContentType, \"image/\") {\n    blankImage(a, w)\n    return\n}\n\nbuf := bytes.NewBuffer(a.Content)\nimg, err := imaging.Decode(buf, imaging.AutoOrientation(true))\n```\n\n`storage.GetAttachmentPart()` reparses the stored raw email and returns the matching attacker-supplied attachment bytes. `Thumbnail()` then calls `imaging.Decode()` before any check on declared dimensions or estimated decoded byt","public_affected_ranges":["<= 1.30.3"]}],"null_published_at":"2026-11-02T10:00:37.208Z","source_updated_at":"2026-09-02T23:39:09.000Z","source_disclosed_at":"2026-09-02T23:39:08.000Z","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"}