CVE-2026-57511
CVE-2026-57511
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 c…
Vulnerability class: CRLF Injection
CVSS v3 metric
CVSS v3 base score 5.4 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N.
Weakness classification (CWE)
References
- disclosure@vulncheck.com (release-notes)
- disclosure@vulncheck.com (issue-tracking)
- disclosure@vulncheck.com (patch)
- disclosure@vulncheck.com (third-party-advisory)
Frequently asked questions
- What is CVE-2026-57511?
- CVE-2026-57511 is a medium-severity vulnerability, classified under CRLF Injection. CVSS score: 5.4/10. Published 2026-07-28.
- How severe is CVE-2026-57511?
- Medium severity. CVSS v3 base score is 5.4 out of 10.