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.

Published: 2013-04-10 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1912 is rated Moderate Risk (57.5/100): CVSS Medium severity, with high exploitation likelihood (EPSS 5.42%, 92th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.23% over the last day, indicating growing attacker interest. High exploitation likelihood—assess exposure and prioritize remediation.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2013-1912

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.19% 5.42% +5.23%
2 2026-05-24 0.14% 0.19% +0.04%
3 2025-03-30 — 0.14% —

Full EPSS history (9 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1912

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.1 2.0 MEDIUM
AV:N/AC:H/Au:N/C:P/I:P/A:P Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:H)
Exploitation requires uncommon or highly specific conditions.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:P)
Partial integrity impact.
Availability impact (A:P)
Partial availability impact.
 4.9 6.4 [email protected]

Weakness enumeration for CVE-2013-1912

OS Trackers for CVE-2013-1912

vendor priority summary link
debian not yet assigned CVE-2013-1912 not yet assigned priority: Debian including 1 source packages (haproxy), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 5. https://security-tracker.debian.org/tracker/CVE-2013-1912
gentoo high CVE-2013-1912: 1 GLSA(s) (201307-01), 1 atom(s) (net-proxy/haproxy); latest impact high. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1912
redhat medium — https://access.redhat.com/security/cve/CVE-2013-1912
ubuntu medium CVE-2013-1912 medium priority: Ubuntu including 1 source packages (haproxy), 7 status rows across 7 suites (hardy, lucid, oneiric, precise, quantal, raring, upstream): released 5, ignored 2. https://ubuntu.com/security/CVE-2013-1912

Affected software / configurations for CVE-2013-1912

Vendor Product Version Raw CPE
haproxy haproxy 1.4 cpe:2.3:a:haproxy:haproxy:1.4:*:*:*:*:*:*:*
haproxy haproxy 1.4.20 cpe:2.3:a:haproxy:haproxy:1.4.20:*:*:*:*:*:*:*
haproxy haproxy 1.4.22 cpe:2.3:a:haproxy:haproxy:1.4.22:*:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev:*:*:*:*:*:*
haproxy haproxy 1.5 cpe:2.3:a:haproxy:haproxy:1.5:dev17:*:*:*:*:*:*

References for CVE-2013-1912

cvelogic Threat Intelligence