CVE-2013-1839

The strHdrAcptLangGetItem function in errorpage.cc in Squid 3.2.x before 3.2.9 and 3.3.x before 3.3.3 allows remote attackers to cause a denial of service (infinite loop and CPU consumption) via a "," character in an Accept-Language header.

Published: 2013-09-30 Last update: 2026-04-29 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2013-1839 is rated High Risk (70.3/100): CVSS High severity, with high exploitation likelihood (EPSS 41.94%, 97th percentile). EPSS ranks this CVE among the most likely to be exploited in the near term. EPSS rose +5.40% 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-2013-1839

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 2026-02-04 36.54% 41.94% +5.40%
2 2025-12-10 37.48% 36.54% -0.94%
3 2025-11-05 — 37.48% —

Full EPSS history (14 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2013-1839

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
7.8 2.0 HIGH
AV:N/AC:L/Au:N/C:N/I:N/A:C Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:N)
No confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:C)
Complete availability impact.
 10.0 6.9 [email protected]

Weakness enumeration for CVE-2013-1839

OS Trackers for CVE-2013-1839

vendor priority summary link
gentoo normal CVE-2013-1839: 1 GLSA(s) (201309-22), 1 atom(s) (net-proxy/squid); latest impact normal. https://bugs.gentoo.org/buglist.cgi?quicksearch=CVE-2013-1839
redhat medium — https://access.redhat.com/security/cve/CVE-2013-1839
ubuntu medium CVE-2013-1839 medium priority: Ubuntu including 1 source packages (squid3), 6 status rows across 6 suites (hardy, lucid, oneiric, precise, quantal, upstream): not-affected 5, needs-triage 1. https://ubuntu.com/security/CVE-2013-1839

Affected software / configurations for CVE-2013-1839

Vendor Product Version Raw CPE
squid-cache squid 3.2.0.1 cpe:2.3:a:squid-cache:squid:3.2.0.1:*:*:*:*:*:*:*
squid-cache squid 3.2.0.2 cpe:2.3:a:squid-cache:squid:3.2.0.2:*:*:*:*:*:*:*
squid-cache squid 3.2.0.3 cpe:2.3:a:squid-cache:squid:3.2.0.3:*:*:*:*:*:*:*
squid-cache squid 3.2.0.4 cpe:2.3:a:squid-cache:squid:3.2.0.4:*:*:*:*:*:*:*
squid-cache squid 3.2.0.5 cpe:2.3:a:squid-cache:squid:3.2.0.5:*:*:*:*:*:*:*
squid-cache squid 3.2.0.6 cpe:2.3:a:squid-cache:squid:3.2.0.6:*:*:*:*:*:*:*
squid-cache squid 3.2.0.7 cpe:2.3:a:squid-cache:squid:3.2.0.7:*:*:*:*:*:*:*
squid-cache squid 3.2.0.8 cpe:2.3:a:squid-cache:squid:3.2.0.8:*:*:*:*:*:*:*
squid-cache squid 3.2.0.9 cpe:2.3:a:squid-cache:squid:3.2.0.9:*:*:*:*:*:*:*
squid-cache squid 3.2.0.10 cpe:2.3:a:squid-cache:squid:3.2.0.10:*:*:*:*:*:*:*
squid-cache squid 3.2.0.11 cpe:2.3:a:squid-cache:squid:3.2.0.11:*:*:*:*:*:*:*
squid-cache squid 3.2.0.12 cpe:2.3:a:squid-cache:squid:3.2.0.12:*:*:*:*:*:*:*
squid-cache squid 3.2.0.13 cpe:2.3:a:squid-cache:squid:3.2.0.13:*:*:*:*:*:*:*
squid-cache squid 3.2.0.14 cpe:2.3:a:squid-cache:squid:3.2.0.14:*:*:*:*:*:*:*
squid-cache squid 3.2.0.15 cpe:2.3:a:squid-cache:squid:3.2.0.15:*:*:*:*:*:*:*
squid-cache squid 3.2.0.16 cpe:2.3:a:squid-cache:squid:3.2.0.16:*:*:*:*:*:*:*
squid-cache squid 3.2.0.17 cpe:2.3:a:squid-cache:squid:3.2.0.17:*:*:*:*:*:*:*
squid-cache squid 3.2.0.18 cpe:2.3:a:squid-cache:squid:3.2.0.18:*:*:*:*:*:*:*
squid-cache squid 3.2.0.19 cpe:2.3:a:squid-cache:squid:3.2.0.19:*:*:*:*:*:*:*
squid-cache squid 3.2.1 cpe:2.3:a:squid-cache:squid:3.2.1:*:*:*:*:*:*:*
squid-cache squid 3.2.2 cpe:2.3:a:squid-cache:squid:3.2.2:*:*:*:*:*:*:*
squid-cache squid 3.2.3 cpe:2.3:a:squid-cache:squid:3.2.3:*:*:*:*:*:*:*
squid-cache squid 3.2.4 cpe:2.3:a:squid-cache:squid:3.2.4:*:*:*:*:*:*:*
squid-cache squid 3.2.5 cpe:2.3:a:squid-cache:squid:3.2.5:*:*:*:*:*:*:*
squid-cache squid 3.2.6 cpe:2.3:a:squid-cache:squid:3.2.6:*:*:*:*:*:*:*
squid-cache squid 3.2.7 cpe:2.3:a:squid-cache:squid:3.2.7:*:*:*:*:*:*:*
squid-cache squid 3.2.8 cpe:2.3:a:squid-cache:squid:3.2.8:*:*:*:*:*:*:*
squid-cache squid 3.3.0 cpe:2.3:a:squid-cache:squid:3.3.0:*:*:*:*:*:*:*
squid-cache squid 3.3.0.2 cpe:2.3:a:squid-cache:squid:3.3.0.2:*:*:*:*:*:*:*
squid-cache squid 3.3.0.3 cpe:2.3:a:squid-cache:squid:3.3.0.3:*:*:*:*:*:*:*
squid-cache squid 3.3.1 cpe:2.3:a:squid-cache:squid:3.3.1:*:*:*:*:*:*:*
squid-cache squid 3.3.2 cpe:2.3:a:squid-cache:squid:3.3.2:*:*:*:*:*:*:*

References for CVE-2013-1839

cvelogic Threat Intelligence