CVE•Published 2026-09-09•Modified 2026-09-09•1 article on news•4 live references•NVD data
CVE-2026-87929
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
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Weaknesses (CWE)
Description
MaxSite CMS through 109.6 ships with a hardcoded session encryption key in application/config/config.php that is never changed during installation, allowing unauthenticated attackers to forge administrator session cookies. Attackers can mint a malicious ci_session cookie with administrator privileges by computing an HMAC-SHA1 using the publicly known encryption key, bypassing authentication checks in is_login() and mso_check_allow() functions.
Timeline
Published 2026-09-09
Modified 2026-09-09
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-2026-87929Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-87929Censys host search filtered to this CVE id.
grep.app
CVE-2026-87929Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-87929GitHub code search for direct mentions.
Google dork
"CVE-2026-87929" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-87929 on GitHub.