Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.
AV AC AT PR UI VC VI VA CVSS EPSS %ile KEV N L N N N L L L 5.5 .0050 40.3 —
AFFECTED Product Versions Fixed sentry-selfhosted-mcp 0.4.0 – —
TIMELINE Aug 26 Reserved by VulDB Aug 26 Published (CNA: VulDB) Aug 27 RESCORED — CVE-2026-81421 (ddfourtwo sentry-selfhosted-mcp). CVSS 6.9 → 5.5 (NVD).
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.
| Date | Event | Detail |
|---|---|---|
| August 26, 2026 | Reserved | Reserved by VulDB |
| August 26, 2026 | Published | Published (CNA: VulDB) |
| August 27, 2026 | RESCORED | RESCORED — CVE-2026-81421 (ddfourtwo sentry-selfhosted-mcp). CVSS 6.9 → 5.5 (NVD). |
| Vendor | Product / Package | Ecosystem | Version introduced | Fixed |
|---|---|---|---|---|
| ddfourtwo | sentry-selfhosted-mcp | — | 0.4.0 | — |
Authoritative record: CVE-2026-81421 at cve.org
Vendors: ddfourtwo
Weaknesses: CWE-918
This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-81421 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.
