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CVE PROGRAM SOURCE RECORD6.3 Medium

CVE-2026-57511

SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title

Description

SuperPlane before 0.30.0 contains an SMTP header injection vulnerability that allows unauthenticated attackers to inject arbitrary SMTP headers by including CRLF sequences in the event payload title field delivered via webhook. Attackers can manipulate the unsanitized title field passed to the SMTP DATA command to add Bcc recipients for content exfiltration, forge the From address to bypass SPF and DKIM checks, or inject Content-Type and MIME boundary headers to corrupt message bodies for phishing.

Affected products

Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.

superplanehq superplane

Default version status: affected

  • 0 to < 0.30.0affected
pkg:github/superplanehq/superplane

References