How severe is CVE-2013-2028?

CVE-2013-2028 has a CVSS 2.0 base score of 7.5, rated high severity.

Is CVE-2013-2028 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 87% (100th percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-2028?

CVE-2013-2028 primarily affects F5 Nginx. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-2028?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.

When was CVE-2013-2028 published?

CVE-2013-2028 was published on 2013-07-20 and last updated on 2026-06-16.

CVE-2013-2028

CVE-2013-2028 is a high-severity vulnerability in F5 Nginx with a CVSS 2.0 base score of 7.5. Its EPSS exploit-prediction score of 87% places it in the 100th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-787.

Key facts

Severity: High (CVSS 2.0 base score 7.5)
EPSS exploit prediction: 87% (100th percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-787
Affected product: F5 Nginx
Published: 2013-07-20
Last modified: 2026-06-16

Description

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.

Frequently asked questions

What is CVE-2013-2028?: 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.
How severe is CVE-2013-2028?: CVE-2013-2028 has a CVSS 2.0 base score of 7.5, rated high severity.
Is CVE-2013-2028 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 87% (100th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-2028?: CVE-2013-2028 primarily affects F5 Nginx. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-2028?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
When was CVE-2013-2028 published?: CVE-2013-2028 was published on 2013-07-20 and last updated on 2026-06-16.

References

Affected products (2)

cpe:2.3:a:f5:nginx:*:*:*:*:*:*:*:*
cpe:2.3:o:fedoraproject:fedora:19:*:*:*:*:*:*:*

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