CVE-2026-57511
6.3
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
Summary
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 Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| superplanehq | superplane | 0 < 0.30.0 | affected |
Weaknesses
- CWE-93: Improper Neutralization of CRLF Sequences ('CRLF Injection')
References
- https://github.com/superplanehq/superplane/releases/tag/v0.30.0
- https://github.com/superplanehq/superplane/pull/6354
- https://github.com/superplanehq/superplane/commit/428c559dd2fa0aef3ba825a434a1b05c9abc7df7
- https://www.vulncheck.com/advisories/superplane-smtp-header-injection-via-webhook-event-title
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.