CVE•Published 2026-05-26•Modified 2026-06-02•0 articles on news•6 live references•NVD data
CVE-2026-42012
Vulnerability data via NVD (ingested)
CVSS v3.1
7.1
HIGH
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:H/A:N
EPSS percentile
—
Weaknesses (CWE)
Description
A flaw was found in gnutls. A remote attacker could exploit this vulnerability by presenting a specially crafted certificate that contains Uniform Resource Identifier (URI) or Service (SRV) Subject Alternative Names (SANs). This could cause the certificate validation process to incorrectly fall back to checking DNS hostnames against the Common Name (CN), potentially allowing the attacker to spoof legitimate services or intercept sensitive information.
Timeline
Published 2026-05-26
Modified 2026-06-02
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-2026-42012Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-42012Censys host search filtered to this CVE id.
grep.app
CVE-2026-42012Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-42012GitHub code search for direct mentions.
Google dork
"CVE-2026-42012" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-42012 on GitHub.
We haven't classified any articles referencing CVE-2026-42012 yet. The external references above still apply.