TI-2026-41406 Aliases CVE-2026-57511 GHSA-c3mp-rj38-mpvh

SuperPlane < 0.30.0 SMTP Header Injection via Webhook Event Title

LOW 28CWE-93Published 2026-07-28 · Updated 2026-07-29

Key facts

Attack vector: Network
Privileges required: None
User interaction: None
Attack complexity: Low
Attack requirements: Present
Impact type: —
Confidentiality · integrity · availability: None · None · None
Fix status: Fixed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA.

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.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV

EPSS 0.00404 34th percentileScored 2026-11-07

Fix Fixed superplane (superplanehq): 0.30.0

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation: None
Automatable: No
Technical impact: Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

Vendor	Product	Affected versions	Fixed in	Status	Source
superplanehq	superplane	before 0.30.0	0.30.0	Patch available	CNA

superplane Vendorsuperplanehq Affected before 0.30.0 Fixed in 0.30.0 Patch available CNA

Remediation

Fix · CNA superplane (superplanehq) Fixed in 0.30.0

Timeline

2026-10-02 Threatist record created from CVE-2026-57511
2026-10-03 Alias added: GHSA-c3mp-rj38-mpvh

References

Patch 1

Patch Commit

Other 2

TI-2026-41405 SuperPlane < 0.27.0 Broken Object Level Authorization via CanvasService gRPC CVSS 4.0HIGH 8.7

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences