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CVE-2026-33515

6.5 · MEDIUM

Squid is a caching proxy for the Web.

Published Mar 26, 2026CWE-125EPSS 1.04%

Overview

CVE-2026-33515 is a medium-severity vulnerability. It was published on March 26, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/squid-cache/squid/commit/8138e909d2058d4401e0ad49b583afaec912b165GitHubgithub.com/squid-cache/squid/pull/2220GitHubgithub.com/squid-cache/squid/pull/2220#discussion_r2727683637GitHubgithub.com/squid-cache/squid/security/advisories/GHSA-84p4-hcx7-jj7cRefwww.openwall.com/lists/oss-security/2026/03/25/4

How CyberStrike helps

Frequently asked questions

What is CVE-2026-33515?

CVE-2026-33515 is a medium-severity vulnerability. It was published on March 26, 2026 and has a CVSS 3.1 base score of 6.5 (MEDIUM).

How severe is CVE-2026-33515?

This vulnerability has a CVSS 3.1 base score of 6.5, rated MEDIUM. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-33515?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-33515?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-33515 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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