Is CVE-2009-4017 in the CISA KEV catalog?

No. CVE-2009-4017 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-4017?

CVE-2009-4017 has a CVSS v2 base score of 5.0 (MEDIUM).

What is the EPSS score for CVE-2009-4017?

CVE-2009-4017 has an EPSS score of 12.04% (96th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-4017?

Upgrade php to 5.2.12 or later.

CVE & CISA-KEV Catalog

CVE-2009-4017

MEDIUMEPSS 96th pctl

5.0

CVSS v2

NVD

Description

PHP before 5.2.12 and 5.3.x before 5.3.1 does not restrict the number of temporary files created when handling a multipart/form-data POST request, which allows remote attackers to cause a denial of service (resource exhaustion), and makes it easier for remote attackers to exploit local file inclusion vulnerabilities, via multiple requests, related to lack of support for the max_file_uploads directive.

CWE-770Allocation of Resources Without Limits or Throttling

How to fix

Remediation Available

phpNVD

Affected:< 5.2.12Fixed in:5.2.12CVE-2009-4017derived from NVD

TridentStack Control can deploy fixes like this automatically across your Windows, macOS, and Linux fleet. See how it works

Remediation is compiled from vendor and distribution security advisories. Always confirm against the linked source for your exact version and platform.

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

12.04%probability of exploitation in 30 days

96thpercentile

Very high risk: more likely to be exploited than 96% of all known CVEs.

References

Patch1

openwall.com

Vendor Advisory2

Third-Party Advisory7

Mailing List3

Release Notes1

php.net

Other references11

Related Vulnerabilities

Other CWE-770 (Allocation of Resources Without Limits or Throttling) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-50387	High	7.5	100%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2019-11479	High	7.5	92%	-	Fix
CVE-2024-27316	High	7.5	91%	-	Fix
CVE-2022-30522	High	7.5	90%	-	Fix
CVE-2019-9515	High	7.5	88%	-	Fix

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-23.