CVE-2019-11049
CVSS v3
6.5
MEDIUM
EPSS Score
4.2 %
exploit probability
CISA KEV
No
known exploited
Exploitation
—
SSVC status
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.
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H
- Published
- 2019-12-10
- Last Modified
- 2026-08-17
Frequently asked questions
What is 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 double-freeing certain memory locations.
Is CVE-2019-11049 actively exploited?
Active exploitation of CVE-2019-11049 has not been confirmed. The EPSS score is 4.2%, indicating the estimated probability of exploitation in the next 30 days.
What is the CVSS score for CVE-2019-11049?
CVE-2019-11049 has a CVSS v3 base score of 6.5 (MEDIUM severity), with vector string CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:H.
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