Is CVE-2013-1839 in the CISA KEV catalog?

No. CVE-2013-1839 is not currently on the CISA Known Exploited Vulnerabilities list.

What is the CVSS severity of CVE-2013-1839?

CVE-2013-1839 has a CVSS v2 base score of 7.8 (HIGH).

What is the EPSS score for CVE-2013-1839?

CVE-2013-1839 has an EPSS score of 18.31% (97th percentile), estimating the probability of exploitation in the next 30 days.

CVE & CISA-KEV Catalog

CVE-2013-1839

HIGHEPSS 97th pctl

7.8

CVSS v2

NVD

Description

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.

CWE-20Improper Input Validation

CVSS v2 Vector

No CVSS vector data available.

Exploit Intelligence

18.31%probability of exploitation in 30 days

97thpercentile

Very high risk: more likely to be exploited than 97% of all known CVEs.

References

http://archives.neohapsis.com/archives/bugtraq/2013-03/0025.html
http://archives.neohapsis.com/archives/bugtraq/2013-03/0069.html
http://secunia.com/advisories/52588
http://www.openwall.com/lists/oss-security/2013/03/11/7
http://www.securityfocus.com/bid/58316
http://www.squid-cache.org/Advisories/SQUID-2013_1.txt

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This product uses NVD data but is not endorsed or certified by the NVD. EPSS scores courtesy of FIRST.org (https://www.first.org/epss). Source: CISA KEV Catalog. Data as of 2026-04-29.