{"id":"CVE-2026-54736","summary":"Phalcon: Non-constant-time HMAC verification in `Encryption\\Crypt::decrypt` (timing side-channel)","details":"Phalcon is a high-performance, full-stack PHP framework. Prior to 5.14.1, Phalcon\\Encryption\\Crypt::decrypt compares the attacker-supplied HMAC tag against the freshly computed HMAC using PHP/Zephir identity comparison, which lowers to a byte-wise comparison that returns early on the first differing byte. This observable timing discrepancy can allow an attacker to recover a valid tag byte-by-byte and attach it to a chosen IV and ciphertext so that decrypt() accepts tampered encrypted content as authentic. This issue is fixed in version 5.14.1.","aliases":["GHSA-8jqh-95g6-7jpj"],"modified":"2026-07-15T01:48:56.491617479Z","published":"2026-07-10T21:02:53.873Z","database_specific":{"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54736.json","cna_assigner":"GitHub_M","cwe_ids":["CWE-208","CWE-347"]},"references":[{"type":"WEB","url":"https://github.com/phalcon/cphalcon/releases/tag/v5.14.1"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54736.json"},{"type":"ADVISORY","url":"https://github.com/phalcon/cphalcon/security/advisories/GHSA-8jqh-95g6-7jpj"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-54736"},{"type":"REPORT","url":"https://github.com/phalcon/cphalcon/issues/17090"},{"type":"FIX","url":"https://github.com/phalcon/cphalcon/commit/ad53ab1b2e7ec59b3af92b0b37b8aaa099011137"},{"type":"FIX","url":"https://github.com/phalcon/cphalcon/pull/17091"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/phalcon/cphalcon","events":[{"introduced":"0"},{"fixed":"ad53ab1b2e7ec59b3af92b0b37b8aaa099011137"},{"fixed":"4e4bb3756654c3ee3e8ac6f7ee2be0705edb2fdf"}],"database_specific":{"source":["AFFECTED_FIELD","REFERENCES"],"extracted_events":[{"introduced":"0"},{"fixed":"5.14.1"}]}}],"versions":["v5.14.0","v5.13.0","v5.12.1","5.12.0","v5.11.1","v5.11.0","v5.10.0","v5.9.3","v5.9.2","v5.9.1","v5.9.0","v5.8.0","v5.7.0","v5.6.2","v5.6.1","v5.6.0","v5.5.0","v5.4.0","v5.3.1","v5.3.0","v5.2.3","v5.2.2","v5.2.1","v5.2.0","v5.1.4","v5.1.3","v5.1.2","v5.1.1","v5.1.0","v5.0.5","v5.0.4","v5.0.3","v5.0.2","v5.0.1","v5.0.0","v5.0.0RC4","v5.0.0RC3","v5.0.0RC2","v5.0.0RC1","v5.0.0beta3","v5.0.0beta2","v5.0.0beta1","v5.0.0alpha7","v5.0.0alpha6","v5.0.0alpha5","v5.0.0alpha4","v5.0.0alpha3","5.0.0alpha3","v5.0.0-alpha.2","v5.0.0-alpha.1","v4.1.0","v4.0.6","v4.0.5","v4.0.4","v4.0.3","v4.0.2","v4.0.1","v4.0.0","v4.0.0-rc.3","v4.0.0-rc.2","v4.0.0-rc.1","v4.0.0-beta.2","v4.0.0-beta.1","v4.0.0-alpha.5","v4.0.0-alpha.3","v4.0.0-alpha.2","v3.2.2","v3.2.1","v3.2.0","v3.1.2","v3.1.1","v3.1.0","v3.0.4","v3.0.3","v3.0.2","v3.0.1","v3.0.0","phalcon-v2.0.13","phalcon-v2.0.11","phalcon-v2.0.10","phalcon-v2.0.9","phalcon-v2.0.8","phalcon-v2.0.7","phalcon-v2.0.6","phalcon-v2.0.5","phalcon-v2.0.4","phalcon-v2.0.3","phalcon-v2.0.2","phalcon-v2.0.1","phalcon-v2.0.0","phalcon-v1.3.4","phalcon-v1.3.3","phalcon-v1.3.2","phalcon-v1.3.1","phalcon-v1.3.0","v1.2.0","phalcon-v1.2.0","v1.1.0","phalcon-v1.1.0","v1.0.1","phalcon-v1.0.1","v1.0.0","phalcon-v1.0.0","v0.9.0","phalcon-v0.9.0","v0.7.0","phalcon-v0.7.0"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-54736.json"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:H/VA:N/SC:N/SI:N/SA:N"}]}