{"id":"CVE-2019-11049","title":"In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can res…","summary":"In PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can res…","severity":"medium","cvss":6.5,"cvssVector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H","cwe":["CWE-415","CWE-415"],"vendor":"php","product":"php","affected":["php >= 7.3.0, <= 7.3.13","php = 7.4.0","fedora = 30","fedora = 31","debian_linux = 10.0","security_center < 5.19.0"],"patched":["security_center 5.19.0"],"published":"2019-12-23","updated":"2026-08-17","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2019-11049","references":[{"url":"https://bugs.php.net/bug.php?id=78943","label":"security@php.net"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/","label":"security@php.net"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/","label":"security@php.net"},{"url":"https://seclists.org/bugtraq/2020/Feb/27","label":"security@php.net"},{"url":"https://security.netapp.com/advisory/ntap-20200103-0002/","label":"security@php.net"},{"url":"https://www.debian.org/security/2020/dsa-4626","label":"security@php.net"},{"url":"https://www.tenable.com/security/tns-2021-14","label":"security@php.net"},{"url":"https://bugs.php.net/bug.php?id=78943","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://seclists.org/bugtraq/2020/Feb/27","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://security.netapp.com/advisory/ntap-20200103-0002/","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.debian.org/security/2020/dsa-4626","label":"af854a3a-2127-422b-91ae-364da2661108"},{"url":"https://www.tenable.com/security/tns-2021-14","label":"af854a3a-2127-422b-91ae-364da2661108"}],"tags":["nvd"],"epss":0.04218,"epssPercentile":0.90573,"ingestedAt":"2026-08-17T14:55:58.910Z","slug":"CVE-2019-11049","body":"## Overview\n\nIn PHP versions 7.3.x below 7.3.13 and 7.4.0 on Windows, when supplying custom headers to mail() function, due to mistake introduced in commit 78f4b4a2dcf92ddbccea1bb95f8390a18ac3342e, if the header is supplied in lowercase, this can result in double-freeing certain memory locations.\n\n## Affected\n\n- `php >= 7.3.0, <= 7.3.13`\n- `php = 7.4.0`\n- `fedora = 30`\n- `fedora = 31`\n- `debian_linux = 10.0`\n- `security_center < 5.19.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `security_center 5.19.0`","depth":"sunlit","depthScore":37,"depthScoreParts":{"impact":35.8,"likelihood":0.8,"exploitation":0,"ransomware":0},"changes":[]}