CVE•Published 2026-06-11•Modified 2026-06-11•1 article on news•5 live references•NVD data
CVE-2026-9648
Vulnerability data via NVD (ingested)
CVSS v3.1
9.1
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N
EPSS percentile
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Description
The crypton-x509-validation Haskell library fails to enforce X.509 NameConstraints, allowing TLS clients to accept certificates whose Subject Alternative Names fall outside the issuing CA’s permitted subtrees. This oversight enables an attacker who compromises a name-constrained sub-CA to impersonate domains beyond its intended scope.
Timeline
Published 2026-06-11
Modified 2026-06-11
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-2026-9648Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-9648Censys host search filtered to this CVE id.
grep.app
CVE-2026-9648Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-9648GitHub code search for direct mentions.
Google dork
"CVE-2026-9648" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-9648 on GitHub.