Account impersonation via unvalidated authentication credentials
Published Sep 3, 2026 · Updated Sep 3, 2026
Authentication bypass in MISP 2.5.45 and earlier allows remote attackers to impersonate existing users through LDAP or LinOTP login. The custom LdapAuthenticate and LinOTPAuthenticate components pass empty or non-string credentials to ldap_bind(), the LinOTP verifier, or local hash checks without CakePHP's normal field validation. Exploitation requires a known directory email and an affected authentication configuration; access inherits the targeted account's permissions.
Summary
What happened
Authentication bypass in MISP 2.5.45 and earlier allows remote attackers to impersonate existing users through LDAP or LinOTP login. The custom LdapAuthenticate and LinOTPAuthenticate components pass empty or non-string credentials to ldap_bind(), the LinOTP verifier, or local hash checks without CakePHP's normal field validation. Exploitation requires a known directory email and an affected authentication configuration; access inherits the targeted account's permissions.
The record
- CVE
- CVE-2026-85216
- Published
- Sep 3, 2026
- Updated
- Sep 3, 2026
- Vendor
- MISP Project
- Product
- MISP
- Classifications
- CWE-521, CAPEC-115, T1078
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Sep 3, 2026CVE publishedPublication date reported by the CVE source.
- Sep 3, 2026Record updatedLatest update available in the CVE record.
Exploitability
Present is not the same as exploitable
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Is a vulnerable build present?
Compare these published version ranges with your installed build and any vendor patches.
- Affected versionversion=0 <=2.5.45
What conditions does exploitation require?
What is affected?
Published CVSS scores
CVSS describes severity. EPSS estimates exploitation probability.
Attacks
What attackers are doing with it
Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.
Weakness, pattern, technique
Public exploit references
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Technologies
Your stack
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Your stack
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