CVE-2026-33515
March 26, 2026
Squid is a caching proxy for the Web. Prior to version 7.5, due to improper input validation, Squid is vulnerable to out of bounds read when handling ICP traffic. This problem allows a remote attacker to receive small amounts of memory potentially containing sensitive information when responding with errors to invalid ICP requests. This attack is limited to Squid deployments that explicitly enable ICP support (i.e. configure non-zero "icp_port"). This problem cannot be mitigated by denying ICP queries using "icp_access" rules. Version 7.5 contains a patch.
Affected Packages
https://github.com/squid-cache/squid.git (GITHUB):
Affected version(s) >=SQUID_3_0_RC1 <SQUID_7_5Fix Suggestion:
Update to version SQUID_7_5https://github.com/squid-cache/squid.git (GITHUB):
Affected version(s) >=SQUID_3_0_RC1 <SQUID_7_5Fix Suggestion:
Update to version SQUID_7_5https://github.com/squid-cache/squid.git (GITHUB):
Affected version(s) >=SQUID_3_0_RC1 <SQUID_7_5Fix Suggestion:
Update to version SQUID_7_5Related Resources (5)
Do you need more information?
Contact UsCVSS v4
Base Score:
6.9
Attack Vector
NETWORK
Attack Complexity
LOW
Attack Requirements
NONE
Privileges Required
NONE
User Interaction
NONE
Vulnerable System Confidentiality
LOW
Vulnerable System Integrity
LOW
Vulnerable System Availability
NONE
Subsequent System Confidentiality
LOW
Subsequent System Integrity
NONE
Subsequent System Availability
NONE
CVSS v3
Base Score:
7.2
Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
CHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Weakness Type (CWE)
EPSS
Base Score:
0.96
