{"id":"AZL-96984","summary":"CVE-2026-54789 affecting package mod_auth_openidc 2.4.14.2-2","details":"mod_auth_openidc is an OpenID Certified authentication and authorization module for the Apache 2.x HTTP server that implements the OpenID Connect Relying Party functionality. Prior to 2.4.19.4, an out-of-bounds read and a one-byte out-of-bounds write exist in the state-cookie parser of `mod_auth_openidc`. The issue is fixed in version 2.4.19.4 by stopping the scan at the string terminator so a value-less token is rejected. No in-product workarounds are available. As a stop-gap, an upstream reverse proxy or WAF that rejects or normalizes malformed `Cookie` headers (tokens lacking `=`) can reduce exposure, but upgrading is the recommended remediation.","modified":"2026-09-10T05:26:53Z","published":"2026-08-21T16:17:19Z","upstream":["CVE-2026-54789"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54789"}],"affected":[{"package":{"name":"mod_auth_openidc","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/mod_auth_openidc"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"2.4.14.2-2"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-96984.json"}}],"schema_version":"1.9.0"}