CVE-2026-59973

unknown

Published 2026-09-11 · Modified 2026-09-11

Discuss on Community Propose mitigation

CVSS v3

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CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:H/I:L/A:N

CVSS v4 NEW

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not yet in upstream

VIR risk

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Description

FrontMCP and mcp-from-openapi have bypass of OpenAPI external $ref SSRF fix

Predictions

Exploit likelihood

30%

Patch ETA

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Heuristic predictions, AS-IS, for prioritization only.

Mitigations

No mitigations published for this CVE yet.

The vendor-content worker queues fetches as references arrive (check back in a few minutes). Or — if you've already worked around this in production — publish your fix to the community-verified tier.

Propose a mitigation on Community Mitigations published via the community go through AI scoring + 2 human reviewers + 7-day silent objection window before landing here with source_tier=community-verified.

Package impact

Ecosystem	Package	Vulnerable	Fixed
npm	mcp-from-openapi	`>=2.3.0,<2.5.0`	`2.5.0`
npm	@frontmcp/adapters	`>=1.2.1,<1.5.0`	`1.5.0`
npm	frontmcp	`>=1.2.1,<1.5.0`	`1.5.0`

References

Community-verified mitigations for this CVE will appear above when contributors publish them.

Verify integrity in audit chain (admin only). AS-IS.