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What are the severity rating and CVSS score of CVE-2026-81421?

The vulnerability CVE-2026-81421 has a severity score of 7.3 out of 10.0, which is classified as HIGH severity.

Which products and vendors are affected by CVE-2026-81421?

This vulnerability affects sentry-selfhosted-mcp from ddfourtwo.

How can I mitigate or patch CVE-2026-81421?

Consult the vendor's security advisory for details and patches.

CVE-2026-81421: CVE-2026-81421 Vulnerability (HIGH Severity, CVSS: 7.3)

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.

Executive Summary

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Technical Details

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Mitigations

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References

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Duis aute irure dolor in reprehenderit in voluptate velit esse cillum dolore eu fugiat nulla pariatur. Excepteur sint occaecat cupidatat non proident, sunt in culpa qui officia deserunt mollit anim id est laborum.

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Additional Metadata

{
  "score": "7.3",
  "pubDate": "2026-08-27T01:18:16.227Z",
  "pubdate": "2026-08-27T01:18:16.227Z"
}

Sceawere

CVE-2026-81421 Verified Sceawere Triage Sources: NVD / CISA KEV

Vulnerability Metadata

Narrative and Response

Description

Executive Summary

Technical Details

Mitigations

References

Additional Metadata