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CVE-2026-92288 is a weak-authentication flaw in LemonLDAP::NG::Portal for Perl. Versions 2.20.0 through before 2.21.6 and 2.22.0 through before 2.23.4 improperly authenticate requests to the OAuth 2.0 token-introspection endpoint for public Relying Parties. The checkEndPointAuthenticationCredentials() function omits client-secret validation for a Relying Party designated public, but still returns a request-derived authentication method such as client_secret_basic or client_secret_post. Because introspection() rejects requests only when this method is absent or none, an attacker can submit a public client identifier with an arbitrary or empty secret and satisfy the endpoint's authentication check.
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What an attacker gets, and what they’ve been doing with it.
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No public exploit code observed for this vulnerability.
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Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
12 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
An information-disclosure vulnerability in LemonLDAP::NG caused by unauthenticated OAuth 2.0 token introspection.
An information-disclosure vulnerability in LemonLDAP::NG caused by unauthenticated OAuth 2.0 token introspection.
An information-disclosure vulnerability in LemonLDAP::NG that permits unauthenticated OAuth 2.0 token introspection.
An information-disclosure vulnerability in LemonLDAP::NG that permits unauthenticated OAuth 2.0 token introspection.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.