CVE•Published 2026-05-09•Modified 2026-08-24•1 article on news•4 live references•NVD data
CVE-2026-42258Ruby-lang · Net\
Vulnerability data via NVD (ingested)
CVSS v3.1
5.3
MEDIUM
CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:H/A:L
EPSS percentile
53
Exploit Prediction Scoring System · top 47% of all CVEs
Weaknesses (CWE)
Description
Net::IMAP implements Internet Message Access Protocol (IMAP) client functionality in Ruby. Prior to versions 0.4.24, 0.5.14, and 0.6.4, symbol arguments to commands are vulnerable to a CRLF Injection / IMAP Command injection via Symbol arguments passed to IMAP commands. This issue has been patched in versions 0.4.24, 0.5.14, and 0.6.4.
Timeline
Published 2026-05-09
Modified 2026-08-24
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-2026-42258Hosts 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-2026-42258Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42258Censys host search filtered to this CVE id.
grep.app
CVE-2026-42258Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42258GitHub code search for direct mentions.
Google dork
"CVE-2026-42258" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.