How severe is CVE-2013-1912?

CVE-2013-1912 has a CVSS 2.0 base score of 5.1, rated medium severity.

Is CVE-2013-1912 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2013-1912?

CVE-2013-1912 primarily affects Haproxy. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.

How do I fix CVE-2013-1912?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

When was CVE-2013-1912 published?

CVE-2013-1912 was published on 2013-04-10 and last updated on 2026-06-16.

CVE-2013-1912

CVE-2013-1912 is a medium-severity vulnerability in Haproxy with a CVSS 2.0 base score of 5.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-119.

Key facts

Severity: Medium (CVSS 2.0 base score 5.1)
EPSS exploit prediction: 5% (92nd percentile)
Actively exploited: Not listed in CISA KEV
Weakness: CWE-119
Affected product: Haproxy
Published: 2013-04-10
Last modified: 2026-06-16

Description

Buffer overflow in HAProxy 1.4 through 1.4.22 and 1.5-dev through 1.5-dev17, when HTTP keep-alive is enabled, using HTTP keywords in TCP inspection rules, and running with rewrite rules that appends to requests, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted pipelined HTTP requests that prevent request realignment from occurring.

Frequently asked questions

What is CVE-2013-1912?: Buffer overflow in HAProxy 1.4 through 1.4.22 and 1.5-dev through 1.5-dev17, when HTTP keep-alive is enabled, using HTTP keywords in TCP inspection rules, and running with rewrite rules that appends to requests, allows remote attackers to cause a denial of service (crash) and possibly execute arbitrary code via crafted pipelined HTTP requests that prevent request realignment from occurring.
How severe is CVE-2013-1912?: CVE-2013-1912 has a CVSS 2.0 base score of 5.1, rated medium severity.
Is CVE-2013-1912 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 5% (92nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1912?: CVE-2013-1912 primarily affects Haproxy. In total, 5 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1912?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
When was CVE-2013-1912 published?: CVE-2013-1912 was published on 2013-04-10 and last updated on 2026-06-16.

References

Affected products (5)

cpe:2.3:a:haproxy:haproxy:1.4:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.20:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.4.22:*:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:*

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