Is CVE-2009-1890 in the CISA KEV catalog?

No. CVE-2009-1890 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2009-1890?

CVE-2009-1890 has a CVSS v2 base score of 7.1 (HIGH).

What is the EPSS score for CVE-2009-1890?

CVE-2009-1890 has an EPSS score of 16.16% (97th percentile), estimating the probability of exploitation in the next 30 days.

How do I fix CVE-2009-1890?

Upgrade apache2 on debian 11 to 2.2.11-7 or later. Fixes are available for 2 affected products.

CVE & CISA-KEV Catalog

CVE-2009-1890

HIGHEPSS 97th pctl

7.1

CVSS v2

NVD

Description

The stream_reqbody_cl function in mod_proxy_http.c in the mod_proxy module in the Apache HTTP Server before 2.3.3, when a reverse proxy is configured, does not properly handle an amount of streamed data that exceeds the Content-Length value, which allows remote attackers to cause a denial of service (CPU consumption) via crafted requests.

CWE-400Resource Exhaustion

How to fix

Remediation Available

apache2Debian

Fixed in:2.2.11-7CVE-2009-1890

httpdWindows application

Affected:2.2.0 2.2.12Fixed in:2.2.12Apache Lounge

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

16.16%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

Related Vulnerabilities

Other CWE-400 (Resource Exhaustion) vulnerabilities, ordered by exploit likelihood. View all

CVE	Severity	CVSS	EPSS	Exploited	Fix
CVE-2023-44487	High	7.5	100%	KEV	Fix
CVE-2021-44228	Critical	10.0	100%	KEV + Ransom	Fix
CVE-2011-3192	High	7.8	99%	-	Fix
CVE-2019-11478	Medium	5.3	95%	-	Fix
CVE-2024-25617	Medium	5.3	89%	-	Fix
CVE-2018-1000115	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.