Vulnerability · Published Aug 26, 2026 · Assigned by VulDB

CVE-2026-81421ddfourtwo sentry-selfhosted-mcp raw_sentry_api server-side request forgery

High 7.3

In plain English

A high-severity server-side request forgery in sentry-selfhosted-mcp from ddfourtwo. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 43% of all known vulnerabilities).

Severity (CVSS 3.1)7.3High

Exploit odds (30 days)0.5%top 57.3% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected products (as reported)

Vendor	Product	Versions
ddfourtwo	sentry-selfhosted-mcp	0.4.0

Weakness: CWE-918 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L/E:P/RL:X/RC:R

References

VDB-395941 | ddfourtwo sentry-selfhosted-mcp raw_sentry_api server-side request forgery vdb-entry, technical-description
VDB-395941 | CTI Indicators (IOB, IOC, IOA) signature, permissions-required
CVE-2026-81421 | CVE Analysis and Report third-party-advisory
Submit #887100 | ddfourtwo sentry-selfhosted-mcp 0.4.0 Server-Side Request Forgery third-party-advisory
https://github.com/ddfourtwo/sentry-selfhosted-mcp/issues/2 exploit, issue-tracking
https://github.com/ddfourtwo/sentry-selfhosted-mcp/ product