CVE-2026-57511
MEDIUM SEVERITYCVSS Score & Metrics
Base Score
5.4 / 10
Vector String
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
Vulnerability 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.
Vulnerability Details
Published Date
Last Modified
CWE ID
CWE-93
Source
NVD
Vendor
superplanehq
Product
superplane
External References
- https://github.com/superplanehq/superplane/commit/428c559dd2fa0aef3ba825a434a1b05c9abc7df7
- https://github.com/superplanehq/superplane/pull/6354
- https://github.com/superplanehq/superplane/releases/tag/v0.30.0
- https://www.vulncheck.com/advisories/superplane-smtp-header-injection-via-webhook-event-title
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