CVE•Published 2026-08-01•Modified 2026-09-08•1 article on news•4 live references•NVD data
CVE-2026-67336
Vulnerability data via NVD (ingested)
CVSS v3.1
8.7
HIGH
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:N
EPSS percentile
5
Exploit Prediction Scoring System · top 95% of all CVEs
Weaknesses (CWE)
Description
better-auth versions before 1.6.11 contain insecure cryptographic defaults in the oidcProvider and mcp plugins that advertise the none algorithm and accept plain PKCE by default. Attackers can exploit algorithm negotiation to accept unsigned tokens or intercept authorization codes when PKCE plain is used instead of the required S256 method.
Timeline
Published 2026-08-01
Modified 2026-09-08
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-2026-67336Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-67336Censys host search filtered to this CVE id.
grep.app
CVE-2026-67336Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-67336GitHub code search for direct mentions.
Google dork
"CVE-2026-67336" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.