{"id":"AZL-104895","summary":"CVE-2026-91768 affecting package php 8.3.33-1","details":"The IPv6 branch of the FastCGI client access check compares only the first 12 bytes of a 16-byte IPv6 address, so listen.allowed_clients matches on a /96 prefix instead of the exact address. An attacker who can source an address sharing the first 96 bits with an allowed one passes the check and reaches the FastCGI endpoint.","modified":"2026-09-27T05:34:32Z","published":"2026-09-25T22:18:49Z","upstream":["CVE-2026-91768"],"references":[{"type":"WEB","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-91768"}],"affected":[{"package":{"name":"php","ecosystem":"Azure Linux:3","purl":"pkg:rpm/azure-linux/php"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"8.3.33-1"}]}],"database_specific":{"source":"https://github.com/microsoft/AzureLinuxVulnerabilityData/blob/main/osv/AZL-104895.json"}}],"schema_version":"1.9.0"}