CVE-2026-90898

9.8 Critique

Publiée le 14/09/2026 à 13:17 · Modifiée le 18/09/2026 à 21:31 · En attente d'analyse NVD · Source : reefs@jfrog.com

Description

Bifrost registers MCP clients through its management API. A stdio client is a command plus args. Bifrost starts that program in the gateway the moment the client is added. No MCP handshake required. The default is governance.auth_config.is_enabled=false. Auth off means every caller is a local admin. One unauthenticated POST /api/mcp/client is enough to run a program as the Bifrost process user (appuser on the official image). transports/v2.1.0 refuses an unauthenticated stdio registration with 403. transports/v2.0.0 still allows it.

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Produits concernés

maximhq Bifrost

Scores CVSS

Version	Score	Source	Vecteur
3.1	9.8 Critique	reefs@jfrog.com	`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`

Faiblesses (CWE)

CWE-284
CWE-306

Références

https://github.com/maximhq/bifrost
https://github.com/maximhq/bifrost/commit/12e170352bd25eab1ae9ba16611f1797d1fd8fdc
https://github.com/maximhq/bifrost/pull/6757
https://github.com/maximhq/bifrost/releases/tag/transports/v2.1.0

Ailleurs

NVD
CVE.org
CIRCL Vulnerability-Lookup
CERT-FR
GitHub Advisories