Is CVE-2013-2028 being actively exploited?

CVE-2013-2028 is not currently listed in the CISA Known Exploited Vulnerabilities (KEV) catalog.

What is the CVSS score for CVE-2013-2028?

CVE-2013-2028 has a CVSS 2.0 base score of 7.5 (HIGH).

CVE-2013-2028

HIGH · CVSS 7.5EPSS 87.5%EU EUVD

The ngx_http_parse_chunked function in http/ngx_http_parse.c in nginx 1.3.9 through 1.4.0 allows remote attackers to cause a denial of service (crash) and execute arbitrary code via a chunked Transfer-Encoding request with a large chunk size, which triggers an integer signedness error and a stack-based buffer overflow.

Key facts

CVSS score: 7.5 (v2.0)
Severity: HIGH
CVSS vector: AV:N/AC:L/Au:N/C:P/I:P/A:P
Weakness (CWE): CWE-787
EPSS score: 87.5% (100th percentile)
In CISA KEV: No
In EU EUVD: Yes (EUVD-2013-2015)
Published: July 20, 2013
NVD last modified: June 16, 2026
Status: Modified

EU Vulnerability Database (EUVD)

This vulnerability is also tracked by ENISA as EUVD-2013-2015 in the EU Vulnerability Database. Last updated in EUVD on August 6, 2024.

View on the EU Vulnerability Database

Affected products

f5 / nginx
fedoraproject / fedora

References

http://lists.fedoraproject.org/pipermail/package-announce/2013-May/105176.html(Third Party Advisory)
http://mailman.nginx.org/pipermail/nginx-announce/2013/000112.html(Mitigation, Patch, Vendor Advisory)
http://nginx.org/download/patch.2013.chunked.txt(Patch, Vendor Advisory)
http://packetstormsecurity.com/files/121675/Nginx-1.3.9-1.4.0-Denial-Of-Service.html(Exploit, Third Party Advisory, VDB Entry)
http://secunia.com/advisories/55181(Third Party Advisory)
http://security.gentoo.org/glsa/glsa-201310-04.xml(Third Party Advisory)
http://www.osvdb.org/93037(Broken Link)
http://www.securityfocus.com/bid/59699(Third Party Advisory, VDB Entry)
http://www.vnsecurity.net/2013/05/analysis-of-nginx-cve-2013-2028/(Broken Link)
https://github.com/rapid7/metasploit-framework/pull/1834(Patch, Third Party Advisory)

Last updated September 17, 2026 · Source: NVD, CISA KEV, FIRST.org EPSS

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