EUVD-2026-63668

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

CVE-2026-67448 Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689)

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

CVE-2026-67448

Mailpit (email testing tool for developers) versions 1.29.0 through 1.30.5 contain a cross-site WebSocket hijacking vulnerability. The origin middleware in server/server.go checks the raw RequestURI for the /api/ prefix, while Go's ServeMux routes on the percent-decoded path. Combined with websoc...

CVE-2026-67448 Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689)

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

CVE-2026-67448 Mailpit: WebSocket origin check bypass via percent-encoded path (regression of CVE-2026-22689)

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

CVE-2026-67446

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit decodes attacker-supplied image attachments into a full raster before checking decoded dimensions, pixel count, or memory use in the GET /api/v1/message/id/part/partID/thumb endpoint. The Thumbnail handler in...

CVE-2026-67445

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine using bufio.Reader.ReadString before session.parseLine parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticate...

EUVD-2026-63664

Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData function calls bufio.Reader.ReadBytes before applying the lendata+lenline size check to the completed SMTP DATA line against Server.MaxSize. An unauthenticated SMTP client...

CVE-2026-67447 Mailpit: SMTP DATA line reader buffers over-limit input before size enforcement

Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData function calls bufio.Reader.ReadBytes before applying the lendata+lenline size check to the completed SMTP DATA line against Server.MaxSize. An unauthenticated SMTP client...

CVE-2026-67447

Mailpit (email testing tool) versions 1.30.0–1.30.4 contain a post-fix gap in the SMTP DATA reader (internal/smtpd/smtpd.go, readData()). The function calls bufio.Reader.ReadBytes('\n') before enforcing the configured MaxMessageSize cap, so a single oversized DATA line is fully allocated in memor...

CVE-2026-67447 Mailpit: SMTP DATA line reader buffers over-limit input before size enforcement

Mailpit is an email testing tool and API for developers. From 1.30.0 until 1.30.5, Mailpit's internal/smtpd/smtpd.go readData function calls bufio.Reader.ReadBytes before applying the lendata+lenline size check to the completed SMTP DATA line against Server.MaxSize. An unauthenticated SMTP client...

CVE-2026-67445 Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine using bufio.Reader.ReadString before session.parseLine parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticate...

CVE-2026-67445 Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine using bufio.Reader.ReadString before session.parseLine parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticate...

CVE-2026-67445

In Mailpit versions prior to 1.30.4, the SMTP command reader in internal/smtpd/smtpd.go uses bufio.Reader.ReadString before enforcing the RFC 5321 512-octet limit, allowing an unauthenticated remote attacker to send oversized command lines (including auth continuation lines) and exhaust memory, r...

CVE-2026-67445 Mailpit: SMTP command parser buffers unbounded command lines before syntax rejection

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit reads SMTP commands through internal/smtpd/smtpd.go session.readLine using bufio.Reader.ReadString before session.parseLine parses the verb or the RFC 5321 512-octet command-line limit is enforced. An unauthenticate...

CVE-2026-67446

Mailpit , an email testing tool and API for developers, is vulnerable to a memory exhaustion issue in its thumbnail generation endpoint (GET /api/v1/message/{id}/part/{partID}/thumb). The handler in server/apiv1/thumbnails.go calls imaging.Decode() with AutoOrientation on attacker-supplied image ...

CVE-2026-67446 Mailpit: Thumbnail generation decodes unbounded image dimensions before scaling

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit decodes attacker-supplied image attachments into a full raster before checking decoded dimensions, pixel count, or memory use in the GET /api/v1/message/id/part/partID/thumb endpoint. The Thumbnail handler in...

CVE-2026-67446 Mailpit: Thumbnail generation decodes unbounded image dimensions before scaling

Mailpit is an email testing tool and API for developers. Prior to 1.30.4, Mailpit decodes attacker-supplied image attachments into a full raster before checking decoded dimensions, pixel count, or memory use in the GET /api/v1/message/id/part/partID/thumb endpoint. The Thumbnail handler in...

CVE-2026-67448: Improper Handling of URL Encoding (Hex Encoding)

Mailpit is an email testing tool and API for developers. From 1.29.0 until 1.30.6, Mailpit's server/server.go origin middleware checks the raw RequestURI for the /api/ prefix while Go's ServeMux routes using the percent-decoded URL path, and server/websockets/client.go configures...

PT-2026-79137

Name of the Vulnerable Software and Affected Versions Mailpit versions prior to 1.30.4 Description An unauthenticated remote SMTP client can send an oversized single command line that is fully allocated before syntax rejection or timeout occurs. This happens because the software reads SMTP comman...