CVE-2013-1839 Denial of service in n/a
Remote attackers can cause a denial of service via infinite loop in Squid proxy by sending a specific Accept-Language header.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2013-1839?
CVE-2013-1839 is a high-severity denial of service vulnerability in Squid-Cache Squid, published on 30 Sep 2013. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official 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.
Weakness: CWE-20
Which versions are affected by CVE-2013-1839?
It affects 1 product.
Products include Squid-Cache Squid.
How do I fix CVE-2013-1839?
No fix has been published for CVE-2013-1839 yet. Limit exposure of the affected software until one is available.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2013-1839 being exploited?
There is no known exploitation of CVE-2013-1839 in the wild and no public exploit code.
Other vulnerabilities in Squid-Cache Squid
- CVE-2025-62168 Squid vulnerable to information disclosure via authentication credential leakage in error handling
- CVE-2025-54574 Squid's URN Handling can lead to Buffer Overflow
- CVE-2026-33526 Squid vulnerable to Denial of Service in ICP Request handling
- CVE-2026-32748 Squid has Denial of Service in ICP Response handling
- CVE-2023-50269 SQUID-2023:10 Denial of Service in HTTP Request parsing
Sources
Also known as GHSA-whxc-8p42-x72j.