CVE•Published 2026-05-09•Modified 2026-05-18•0 articles on news•6 live references•NVD data
CVE-2026-42246Ruby-lang · Net\
Vulnerability data via NVD (ingested)
CVSS v3.1
7.4
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
—
Weaknesses (CWE)
Description
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4, a man-in-the-middle attacker can cause Net::IMAP#starttls to return "successfully", without starting TLS. This issue has been patched in versions 0.3.10, 0.4.24, 0.5.14, and 0.6.4.
Timeline
Published 2026-05-09
Modified 2026-05-18
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).
Shodan · vuln tag0 hosts
vuln:CVE-2026-42246Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product + version
product:"Ruby-lang Net\" version:"\"Version-pinned fingerprint from NVD's first vulnerable CPE.
Shodan · banner/body mention
http.html:"Net\"HTTP body or banner mentions "Net\" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-42246Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42246Censys host search filtered to this CVE id.
grep.app
CVE-2026-42246Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42246GitHub code search for direct mentions.
Google dork
"CVE-2026-42246" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42246 on GitHub.
We haven't classified any articles referencing CVE-2026-42246 yet. The external references above still apply.