{
  "affected": [
    {
      "ranges": [
        {
          "database_specific": {
            "extracted_events": [
              {
                "introduced": "0"
              },
              {
                "fixed": "5.14.1"
              }
            ],
            "source": [
              "AFFECTED_FIELD",
              "REFERENCES"
            ]
          },
          "events": [
            {
              "introduced": "0"
            },
            {
              "fixed": "ad53ab1b2e7ec59b3af92b0b37b8aaa099011137"
            },
            {
              "fixed": "4e4bb3756654c3ee3e8ac6f7ee2be0705edb2fdf"
            }
          ],
          "repo": "https://github.com/phalcon/cphalcon",
          "type": "GIT"
        }
      ]
    }
  ],
  "aliases": [
    "GHSA-8jqh-95g6-7jpj"
  ],
  "database_specific": {
    "cna_assigner": "GitHub_M",
    "cwe_ids": [
      "CWE-208",
      "CWE-347"
    ],
    "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/54xxx/CVE-2026-54736.json"
  },
  "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.",
  "id": "CVE-2026-54736",
  "modified": "2026-07-15T01:48:56.491617479Z",
  "published": "2026-07-10T21:02:53.873Z",
  "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"
    }
  ],
  "schema_version": "1.8.0",
  "severity": [
    {
      "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",
      "type": "CVSS_V4"
    }
  ],
  "summary": "Phalcon: Non-constant-time HMAC verification in `Encryption\\Crypt::decrypt` (timing side-channel)"
}