CVE-2019-11043

CVE-2019-11043 is a high-severity vulnerability in Php with a CVSS 3.x base score of 8.7. It is listed in CISA's Known Exploited Vulnerabilities (KEV) catalog, confirming it has been exploited in the wild (added 2022-03-25). The underlying weakness is classified as CWE-787.

Key facts

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.

Frequently asked questions

What is CVE-2019-11043?
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.
How severe is CVE-2019-11043?
CVE-2019-11043 has a CVSS 3.x base score of 8.7, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability none.
Is CVE-2019-11043 being actively exploited?
Yes. CVE-2019-11043 is on CISA's Known Exploited Vulnerabilities (KEV) catalog, added on 2022-03-25, which means active exploitation has been confirmed. It should be prioritised for remediation.
What products are affected by CVE-2019-11043?
CVE-2019-11043 primarily affects Php. In total, 64 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2019-11043?
Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Because this CVE is known to be actively exploited, treat remediation as urgent — CISA KEV typically sets a short remediation deadline.
Does CVE-2019-11043 have an EU (EUVD) identifier?
Yes. CVE-2019-11043 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2019-2751. It is also flagged as exploited in the EUVD (since 2022-03-25).
When was CVE-2019-11043 published?
CVE-2019-11043 was published on 2019-10-28 and last updated on 2026-06-17.

References

Affected products (64)

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Threat intelligence

Threat-intel indicators referencing this CVE: