CVE-2026-66005

Published: Lug 24, 2026 Last Modified: Lug 24, 2026
ExploitDB:
Other exploit source:
Google Dorks:
MEDIUM 5,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: passive
Confidentiality: N/A
Integrity: N/A
Availability: N/A
MEDIUM 6,3
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: none
User Interaction: required
Scope: unchanged
Confidentiality: low
Integrity: low
Availability: low

Description

AI Translation Available

Jan through 0.8.4, fixed in commit 3e1c1e7, contains a CORS misconfiguration vulnerability in its local API server that allows network-adjacent attackers to bypass trusted host restrictions by exploiting the server's replacement of user-configured trusted hosts with a wildcard that reflects arbitrary origins with credentials. Attackers on the local network or using DNS rebinding can reach the unauthenticated OpenAI-compatible API to perform inference, enumerate models, invoke MCP tools, and read cross-origin responses.

EPSS (Exploit Prediction Scoring System)

Trend Analysis

EPSS (Exploit Prediction Scoring System)

Prevede la probabilità di sfruttamento basata su intelligence sulle minacce e sulle caratteristiche della vulnerabilità.

EPSS Score
0,0019
Percentile
0,1th
Updated

Single Data Point

Only one EPSS measurement is available for this CVE. Trend analysis requires multiple data points over time.

183

Permissive List of Allowed Inputs

Draft
Abstraction: Base Structure: Simple
Common Consequences
Security Scopes Affected:
Access Control
Potential Impacts:
Bypass Protection Mechanism
Applicable Platforms
All platforms may be affected
View CWE Details
942

Permissive Cross-domain Security Policy with Untrusted Domains

Incomplete
Abstraction: Variant Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Availability Access Control
Potential Impacts:
Execute Unauthorized Code Or Commands Bypass Protection Mechanism Read Application Data Varies By Context
Applicable Platforms
Technologies: Web Based, Web Server
View CWE Details
https://github.com/janhq/jan/commit/3e1c1e724f696620d89bb4a…
https://github.com/janhq/jan/commit/3e1c1e724f696620d89bb4a9cc18a380e0753757
https://github.com/janhq/jan/issues/8453
https://github.com/janhq/jan/issues/8453
https://github.com/janhq/jan/pull/8506
https://github.com/janhq/jan/pull/8506
https://www.vulncheck.com/advisories/jan-local-api-server-c…
https://www.vulncheck.com/advisories/jan-local-api-server-cors-origin-reflectio…