CVE-2026-33515
Squid has issues in ICP message handling
CVSS Score
0.0
EPSS Score
1.0%
EPSS Percentile
76th
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.
| CWE | CWE-125 CWE-1289 |
| Vendor | squid-cache |
| Product | squid |
| Published | Mar 26, 2026 |
| Last Updated | Mar 26, 2026 |
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Affected Versions
squid-cache / squid
< 7.5
References
github.com: https://github.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7c github.com: https://github.com/squid-cache/squid/pull/2220 github.com: https://github.com/squid-cache/squid/pull/2220#discussion_r2727683637 github.com: https://github.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165 openwall.com: http://www.openwall.com/lists/oss-security/2026/03/25/4