VULNERABILITY INTELLIGENCE

CVE-2020-15049

CVSS score9.9 CRITICAL
EPSS probability5.71%
CISA KEVNot currently listed
Published2020-06-30
Last modified2026-06-17
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H

Description

An issue was discovered in http/ContentLengthInterpreter.cc in Squid before 4.12 and 5.x before 5.0.3. A Request Smuggling and Poisoning attack can succeed against the HTTP cache. The client sends an HTTP request with a Content-Length header containing "+\ "-" or an uncommon shell whitespace character prefix to the length field-value.

Weakness classification

  • nvd@nist.gov: CWE-444

Primary references