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CVE-2026-81421

7.3 · HIGH

A security flaw has been discovered in ddfourtwo sentry-selfhosted-mcp 0.4.0.

Published Aug 27, 2026CWE-918EPSS 0.50%

Overview

CVE-2026-81421 is a high-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

Technical description

A security flaw has been discovered in ddfourtwo sentry-selfhosted-mcp 0.4.0. The affected element is an unknown function of the component raw_sentry_api. The manipulation of the argument endpoint results in server-side request forgery. It is possible to launch the attack remotely. 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/ddfourtwo/sentry-selfhosted-mcp/GitHubgithub.com/ddfourtwo/sentry-selfhosted-mcp/issues/2Refvuldb.com/cve/CVE-2026-81421Refvuldb.com/submit/887100Refvuldb.com/vuln/395941Refvuldb.com/vuln/395941/cti

How CyberStrike helps

Frequently asked questions

What is CVE-2026-81421?

CVE-2026-81421 is a high-severity vulnerability. It was published on August 27, 2026 and has a CVSS 3.1 base score of 7.3 (HIGH).

How severe is CVE-2026-81421?

This vulnerability has a CVSS 3.1 base score of 7.3, rated HIGH. It can be exploited remotely over the network. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-81421?

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-2026-81421?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-81421 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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