Date of Breach:23 October 2025
Descrition of breach - In October 2025, the publishing platform Substack suffered a data breach that was subsequently circulated more widely in February 2026. The breach exposed 663k account holder records containing email addresses along with publicly visible profile information from Substack accounts, such as publication names and bios. A subset of records also included phone numbers. The Substack was breached by @w1kkid.
Compromised data: Bios, Email addresses, Phone numbers, Usernames.
Amount of records:689,756 users lines, 663,145 unique email addresses.
Page for checking relevant data - Added to HIBP list - https://haveibeenpwned.com/Breach/Substack
Thread link - /Thread-DATABASE-Substack-Leaked-Download


SAMPLES:id,name,email,email_confirmed,email_confirmation_token,stripe_platform_customer_id,is_global_admin,is_ghost,created_at,anonymous_id,email_bounce_count,photo_url,publisher_agreement_accepted_at,bio,updated_at,profile_set_up_at,tos_accepted_at,email_digest_at,has_passed_captcha,import_confirmation_required,post_notification_preference,reader_installed_at,activity_items_viewed_at,dismissed_ios_app_promo_at,email_notifications_last_resumed_at,previous_name,release_group,handle,phone,bank_payment_failures,is_globally_banned,session_version
100002465,The Leyton Orientear,editor@leytonorientear.com,True,,,False,False,2022-07-28T04:26:51.068Z,,,https://substack-post-media.s3.amazonaws.com/public/images/90e85c25-6c54-4ef8-a7aa-61e5c610fbae_572x638.jpeg,2024-07-18T14:52:31.526Z,Still the second oldest continually published football fanzine in England. Justified and Ancient. Labour of Love. Activist shareholders. Legacy fans. Legacy media. Jobi McAnuff Stan account.,2025-09-24T21:05:23.517Z,2024-07-18T15:06:29.294Z,,,,False,,2024-11-25T17:37:44.169Z,2025-09-24T21:05:23.396Z,,,,,theleytonorientear,+447814017370,0,False,0
100001000,f4eodhm983,o1tvltk889@gjjdiwoa.com,False,,,False,False,2022-07-28T03:34:44.831Z,f912856e-ea28-411b-b345-ea76de4e9042,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/382fa02f-cd64-47ff-9227-de4dd1216526_144x144.png,2022-07-28T03:34:44.831Z,,2024-07-04T10:09:47.152Z,2022-07-28T03:35:36.721Z,,,,False,,,,,,,,f4eodhm983,,0,False,0
100001600,jc,fleingcho@yahoo.com,True,,cus_QdgXhftboBfYVJ,False,False,2022-07-28T03:59:42.098Z,0b717ce5-fee0-4787-96ff-7ff9ab0977ce,,,,,2025-01-21T19:43:38.488Z,2024-07-21T03:46:29.582Z,,,,False,all,2024-07-21T03:46:01.937Z,2025-01-21T19:43:37.316Z,,,,,fleingcho,+573022769576,0,False,0
10000235,Pvnxwfg,fjosre@gmail.com,False,,,False,False,2020-05-11T23:18:57.680Z,,,,,,2023-07-18T14:47:59.589Z,,,,,False,,,,,,,,,,0,False,0
100000341,Wesley Gomes,wgomes81@icloud.com,True,,cus_M8geXYBKtzkVu0,False,False,2022-07-28T03:09:54.562Z,cfc8f73c-9d26-4f69-bc32-c0d73970759a,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/d9b28096-caaf-4f22-8be5-db31977c8fe4_1282x1284.jpeg,,,2025-08-15T02:02:19.050Z,2022-07-28T03:29:32.547Z,,,,False,push,2022-07-28T03:28:45.378Z,2025-08-15T02:02:18.842Z,,,,,lazysmurfpnw,+19163359851,0,False,0
100000381,ob/sol,obsolnewsletter@gmail.com,False,,,False,False,2022-07-28T03:11:52.764Z,c25622f3-05b5-4226-b9d3-6641e1d244a7,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/3d188087-dfd0-4539-860e-7471d7ec3915_2359x2313.png,2022-07-28T03:11:52.764Z,"Bienvenue sur ob/sol, une newsletter d’économie financière fraîche et décontractée. Ton dépanneur du coin, loin des fanfaronnades.
",2024-12-23T15:09:11.027Z,2022-07-28T03:12:07.417Z,,,,False,,,2024-12-23T15:09:10.278Z,,,singlemalt_obsol,,obsol,,0,False,0
100002578,Yuriko UEYAMA,yuriko204015@gmail.com,False,,,False,True,2022-07-28T04:29:31.015Z,9d5ae177-0e1e-436e-983d-7c9d369311a7,,,,,2022-08-18T05:52:39.219Z,,,,,False,,,,,,,,,,0,False,0
100000804,Tim Carter,carter.tim@hotmail.com,True,,cus_OsWJ7zFJqJJMFy,False,False,2022-07-28T03:23:55.149Z,,,https://substack-post-media.s3.amazonaws.com/public/images/43117270-f983-4f0c-b770-9cbf321c165a_1168x1140.jpeg,2025-02-13T00:26:26.136Z,I’m a film photographer and well dressed man about town. I watch too many movies. ,2025-09-20T00:40:20.995Z,2023-02-07T01:17:12.303Z,,,,False,all,2023-02-07T01:16:35.905Z,2025-09-20T00:40:20.794Z,,2023-05-26T17:32:17.963Z,,,tscarterphotography,,0,False,0
1000002,George Gray,George@drgray.co.nz,True,,cus_H2j52J9rIpOt9F,False,False,2018-10-13T13:56:31.911Z,b0fb0426-742e-4ead-9f10-8b0bf9e05a63,,"https://substackcdn.com/image/fetch/f_auto,q_auto:good,fl_progressive:steep/https%3A%2F%2Fsubstack-post-media.s3.amazonaws.com%2Fpublic%2Fimages%2Face2b9b4-525c-4e90-883b-fdc9b934bfca_144x144.png",2023-01-11T20:35:21.688Z,I'm a public health physician doing my best to keep up with the latest research and make it actionable.,2025-07-14T19:07:07.060Z,2023-01-11T20:34:58.435Z,,,,False,,,2025-07-14T19:07:06.656Z,,,,,healthupdate,,0,False,0
100001222,bnh0t3ld5k5r,businesshoteldakar4525@gmail.com,False,,,False,False,2022-07-28T03:45:34.908Z,4a5708bb-e06d-4826-baef-99446eb03f6e,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/c10b706d-8970-49f2-901d-fbcabd352015_144x144.png,2022-07-28T03:45:34.908Z,,2024-07-04T10:09:48.684Z,2022-07-28T03:45:56.808Z,,,True,False,,,,,,,,bnh0t3ld5k5r,,0,False,0
100001750,Harley Dotson,harleydotson@outlook.com,True,,,False,False,2022-07-28T04:07:19.352Z,a70a0ce4-4e65-4568-925d-934ed5592345,,,,,2025-02-05T20:35:06.201Z,2025-02-04T20:38:56.866Z,,,,False,all,2025-02-04T20:38:51.824Z,2025-02-05T20:35:06.090Z,,,,,harleydotson,+15127516400,0,False,0
100001756,Ankur Upadhyay,upadhyay.ankur61@gmail.com,True,,,False,False,2022-07-28T04:07:45.394Z,c0ab5c07-af1b-4461-b737-b279b3f05023,,https://substack-post-media.s3.amazonaws.com/public/images/8fa0db94-ebe1-4cc0-a7f6-6e43b548dd6e_1179x1179.jpeg,2025-05-26T23:38:41.100Z,"Senior Tech PM @ O9 Solutions, Data platform | “ProductandChill” Newsletter | Weekly PM wisdom that actually works in the real world",2025-06-08T19:45:11.299Z,2023-12-28T20:46:23.031Z,,,,True,all,2025-05-26T23:51:29.910Z,2025-06-08T19:45:11.004Z,,,ankur upadhyay,,productandchill,+918700320874,0,False,0
100000456,CrossPacificWatchers,tiandongdong1984@gmail.com,True,,,False,False,2022-07-28T03:15:40.853Z,,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/daed37b6-4a75-4a01-91ee-f5d2c5caccef_512x656.png,2022-07-28T16:39:59.994Z,"Ran by TIAN Dongdong, this newsletter features daily and trustworthy content on China's economy. Based in Brussels, London, Cairo, Tripoli for Chinese media, TIAN is now in Beijing.",2025-09-28T07:39:30.390Z,2022-07-28T03:16:44.419Z,,,True,False,,,2025-09-28T07:39:29.595Z,,,CrossPacificWatcher,,tiandongdong,,0,False,0
100003058,Eric Fett,ericwfett@gmail.com,True,,cus_NaBmLvPHMlv9mC,False,False,2022-07-28T04:39:54.522Z,d9b1c627-3b82-46c8-8429-b559882a5980,,https://substack-post-media.s3.amazonaws.com/public/images/d7797675-2280-4f40-81c4-c7d1425b6bb8_1179x1179.jpeg,2023-09-24T23:04:02.291Z,"Venture investor @NGPCapital. Focus on US/Europe, Series A/B, and B2B tech. Lead editor @TheGenAICollective. Previously @Accenture 🎓 @Dartmouth. Boba's distant cousin",2025-09-26T17:27:27.411Z,2023-03-24T03:36:17.449Z,,,,False,,2023-06-24T04:50:03.684Z,2025-09-26T17:27:27.167Z,,,Eric,,ericfett,+13109096710,0,False,0
100002726,Daphne 2 Johnson,d2j7866@yahoo.com,True,,cus_M8fm6lR9DzoFHt,False,False,2022-07-28T04:33:12.048Z,9bbb562b-df66-4c74-bf1d-bd0c1aa898e5,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/986c2221-dd6d-4573-a586-8827cf9622be_144x144.png,,Retail manager for way too many years,2024-07-04T10:09:55.819Z,2022-07-28T04:40:40.194Z,,,,False,,,2023-08-29T04:30:06.906Z,,,,,daphne2johnson,,0,False,0
1000034,Jackson,jackson.rowe@gmail.com,True,,cus_MvpBc9S8UK9ENP,False,False,2018-10-13T14:04:55.354Z,d99fcfb4-76f8-4305-bbe4-6f1b699db0fc,,https://bucketeer-e05bbc84-baa3-437e-9518-adb32be77984.s3.amazonaws.com/public/images/c1469dac-e73a-4c90-8aca-9906bc1bbe19_144x144.png,,Developer,2025-04-28T10:05:41.034Z,2022-12-06T09:36:15.117Z,,2021-05-16T03:17:41.617Z,,False,push,2023-01-05T06:07:19.843Z,2025-04-28T10:05:40.877Z,,,Jackson Rowe,,jackson255848,+61456584444,0,False,0
