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CVE-2026-9541

5.3 · MEDIUM

A security flaw has been discovered in Squirrel up to 3.2.

Published May 26, 2026CWE-119EPSS 0.19%

Overview

CVE-2026-9541 is a medium-severity vulnerability. It was published on May 26, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

Technical description

A security flaw has been discovered in Squirrel up to 3.2. Impacted is the function ReadObject of the file squirrel/sqobject.cpp of the component Cnut File Handler. Performing a manipulation results in heap-based buffer overflow. The attack is only possible with local access. The exploit has been released to the public and may be used for attacks. The project was informed of the problem early through an issue report but has not responded yet.

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/albertodemichelis/squirrel/issues/327GitHubgithub.com/biniamf/pocs/tree/main/squirrel-sqobject-readobject-neg-len-oobRefvuldb.com/submit/814826Refvuldb.com/vuln/365602Refvuldb.com/vuln/365602/ctiGitHubgithub.com/albertodemichelis/squirrel/issues/327

How CyberStrike helps

Frequently asked questions

What is CVE-2026-9541?

CVE-2026-9541 is a medium-severity vulnerability. It was published on May 26, 2026 and has a CVSS 3.1 base score of 5.3 (MEDIUM).

How severe is CVE-2026-9541?

This vulnerability has a CVSS 3.1 base score of 5.3, rated MEDIUM. It requires local or adjacent network access to exploit. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-9541?

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-2026-9541?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-9541 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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