CVE-2019-11043
Underflow in PHP-FPM can lead to RCE
PHP FastCGI Process Manager (FPM) Buffer Overflow Vulnerability is confirmed as actively exploited and is listed in the CISA KEV catalog.
Required action
Apply updates per vendor instructions.
CISA notes
https://nvd.nist.gov/vuln/detail/CVE-2019-11043
Description
In PHP versions 7.1.x below 7.1.33, 7.2.x below 7.2.24 and 7.3.x below 7.3.11 in certain configurations of FPM setup it is possible to cause FPM module to write past allocated buffers into the space reserved for FCGI protocol data, thus opening the possibility of remote code execution.
Severity
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:H/A:NExploitation Context
as of October 14, 2026- CISA added CVE-2019-11043 to the KEV catalog 879 days after its CVE record was published.
- It is one of 3 PHP entries in the CISA KEV catalog, and one of 2 added in 2022.
- Its current EPSS score (99.7%) is higher than that of 90% of CISA KEV entries.
Affected Products
| Vendor | Product | Affected versions |
|---|---|---|
| PHP | PHP PHP | 7.1.x to <7.1.33 7.2.x to <7.2.24 7.3.x to <7.3.11 |
References
27 Links- https://github.com/neex/phuip-fpizdam
- https://bugs.php.net/bug.php?id=78599
- https://support.f5.com/csp/article/K75408500?utm_source=f5support&%3Butm_medium=RSS
- https://security.netapp.com/advisory/ntap-20191031-0003/
- https://www.synology.com/security/advisory/Synology_SA_19_36
- https://support.apple.com/kb/HT210919
- http://packetstormsecurity.com/files/156642/PHP-FPM-7.x-Remote-Code-Execution.html
- https://www.tenable.com/security/tns-2021-14
Record Details
Related
Tool categories
CVE record data © The MITRE Corporation, used under the CVE Terms of Use. Exploited-in-the-wild data from the CISA Known Exploited Vulnerabilities catalog (CC0). Exploit prediction scores by FIRST EPSS (first.org/epss). This site is not endorsed or certified by MITRE, NVD, CISA, or FIRST.