Is CVE-2020-15049 actively exploited?

CVE-2020-15049 has no public evidence of in-the-wild exploitation as of 2024-11-21.

What is the CVSS score for CVE-2020-15049?

CVE-2020-15049 has a CVSS score of 9.9 (CRITICAL severity). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H.

How do I patch CVE-2020-15049?

Patch guidance is available from squid-cache security advisories. CVEDatabase generates AI-assisted remediation guidance on demand for CVE-2020-15049.

Fix CVE-2020-15049 - CRITICAL squid-cache squid

Q: Which products are affected by CVE-2020-15049?

14 products: squid-cache squid, squid-cache squid, squid-cache squid, squid-cache squid, squid-cache squid, and 9 more.

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.

CVSS Metrics

Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:H/A:H
Attack Vector: network
Complexity: low
Privileges: low
User Action: none
Scope: changed
Confidentiality: high
Integrity: high
Availability: high
Weaknesses: CWE-444

Metadata

Primary Vendor: SQUID-CACHE
Published: 6/30/2020
Last Modified: 11/21/2024
Source: NIST NVD
Note: Verify all details with official vendor sources before applying patches.

Affected Products

squid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidsquid-cache : squidfedoraproject : fedora

Remediation Guidance

Executive Summary

Cite this page

CVE-2020-15049. CVEDatabase.com. Retrieved 1 May 2026. https://cvedatabase.com/cve/CVE-2020-15049

View on NIST NVD

CVE-2020-15049 vulnerability