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CVE-2026-54049

8.7 · HIGH

Sakai is a Collaboration and Learning Environment (CLE).

Published Oct 1, 2026CWE-79EPSS 0.32%

Overview

CVE-2026-54049 is a high-severity vulnerability. It was published on October 1, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

Technical description

Sakai is a Collaboration and Learning Environment (CLE). From versions 23.0 to before 23.5, and versions 25.0 to before 25.3, the Sakai Conversations tool stores topic and post messages without HTML sanitization, and the frontend renders them using LitElement's unsafeHTML() directive, resulting in stored cross-site scripting (XSS). Any authenticated user with access to a site that has the Conversations tool enabled can inject arbitrary HTML and JavaScript that executes in the browsers of all other users who view that topic or post. This issue has been patched in versions 23.5, 25.3, and 26.0.

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/sakaiproject/sakai/commit/2696b4b48cbef2e81512f52f84f7477adff78b27GitHubgithub.com/sakaiproject/sakai/security/advisories/GHSA-w2x5-gv52-9ccvGitHubgithub.com/sakaiproject/sakai/security/advisories/GHSA-w2x5-gv52-9ccv

How CyberStrike helps

Frequently asked questions

What is CVE-2026-54049?

CVE-2026-54049 is a high-severity vulnerability. It was published on October 1, 2026 and has a CVSS 3.1 base score of 8.7 (HIGH).

How severe is CVE-2026-54049?

This vulnerability has a CVSS 3.1 base score of 8.7, rated HIGH. It can be exploited remotely over the network. Some level of privileges is required for exploitation.

How do I fix or remediate CVE-2026-54049?

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-2026-54049?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-54049 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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