CVE•Published 2026-07-28•Modified 2026-07-29•0 articles on news•4 live references•NVD data
CVE-2026-57511
Vulnerability data via NVD (ingested)
CVSS v3.1
5.4
MEDIUM
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:L/I:L/A:N
EPSS percentile
—
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.
Timeline
Published 2026-07-28
Modified 2026-07-29
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-57511Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-57511Censys host search filtered to this CVE id.
grep.app
CVE-2026-57511Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-57511GitHub code search for direct mentions.
Google dork
"CVE-2026-57511" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-57511 on GitHub.
We haven't classified any articles referencing CVE-2026-57511 yet. The external references above still apply.