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.
Affected products
| Vendor | Product | Affected | Fixed |
|---|---|---|---|
| PHP Group | PHP | 7.3.x – < 7.3.13, 7.4.x – < 7.4.1 | 7.3.13 |
Advisories 3
- FSA-202302 Festo: Several vulnerabilities in FactoryViews CERT@VDE · Feb 2, 2026
- ICSA-26-027-02 Festo Didactic SE MES PC CISA ICS & IT advisories · Jan 27, 2026
- FSA-202402 Several Vulnerabilities in MES PC (Windows 10) CERT@VDE · Dec 8, 2025
References
- https://bugs.php.net/bug.php?id=78943
- https://security.netapp.com/advisory/ntap-20200103-0002/
- FEDORA-2019-437d94e271 vendor-advisory
- FEDORA-2019-a54a622670 vendor-advisory
- 20200218 [SECURITY] [DSA 4626-1] php7.3 security update mailing-list
- DSA-4626 vendor-advisory
- https://www.tenable.com/security/tns-2021-14