CVE-2013-1839

CVE-2013-1839 is a high-severity vulnerability in Squid-cache Squid with a CVSS 2.0 base score of 7.8. Its EPSS exploit-prediction score of 18% places it in the 97th percentile, indicating an elevated likelihood of exploitation. The underlying weakness is classified as CWE-20.

Key facts

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.

Frequently asked questions

What is 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.
How severe is CVE-2013-1839?
CVE-2013-1839 has a CVSS 2.0 base score of 7.8, rated high severity.
Is CVE-2013-1839 being actively exploited?
It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 18% (97th percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2013-1839?
CVE-2013-1839 primarily affects Squid-cache Squid. In total, 32 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
How do I fix CVE-2013-1839?
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-2013-1839 published?
CVE-2013-1839 was published on 2013-09-30 and last updated on 2026-06-16.

References

Affected products (32)

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