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.
History

Wed, 29 Jul 2026 16:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'partial'}, 'version': '2.0.3'}


Tue, 28 Jul 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Superplanehq
Superplanehq superplane
Vendors & Products Superplanehq
Superplanehq superplane

Tue, 28 Jul 2026 19:30:00 +0000

Type Values Removed Values Added
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.
Title SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title
Weaknesses CWE-93
References
Metrics cvssV3_1

{'score': 5.4, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N'}

cvssV4_0

{'score': 6.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:L/SI:L/SA:N'}


cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-07-28T19:09:47.930Z

Updated: 2026-07-29T15:25:00.652Z

Reserved: 2026-06-24T15:58:58.537Z

Link: CVE-2026-57511

cve-icon Vulnrichment

Updated: 2026-07-29T13:23:12.370Z

cve-icon NVD

No data.

cve-icon Redhat

No data.