CVE-2019-11049
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 result in…
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (4.22%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
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 result in double-freeing certain memory locations.
- CVSS 3.1
- 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
- EPSS
- 4.22% probability · 91th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-415
- Affected
- php/php · fedoraproject/fedora · debian/debian linux · tenable/security center
- Source
- security@php.net
EPSS 4.2% since 27 October 2026; no change recorded yet. Points are recorded when the score first appears and whenever it moves by a percentage point or more.
References
- https://bugs.php.net/bug.php?id=78943Mailing List, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
- https://seclists.org/bugtraq/2020/Feb/27Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200103-0002/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4626Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
- https://bugs.php.net/bug.php?id=78943Mailing List, Patch, Vendor Advisory
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/N7GCOAE6KVHYJ3UQ4KLPLTGSLX6IRVRN/
- https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/XWRQPYXVG43Q7DXMXH6UVWMKWGUW552F/
- https://seclists.org/bugtraq/2020/Feb/27Mailing List, Third Party Advisory
- https://security.netapp.com/advisory/ntap-20200103-0002/Third Party Advisory
- https://www.debian.org/security/2020/dsa-4626Third Party Advisory
- https://www.tenable.com/security/tns-2021-14Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.