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CVE-2026-40965

Quick assessment

Affected
Cloud Foundry Foundation uaa_release
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Cloud Foundry UAA是美国Cloud Foundry基金会的一款应用于CloudFoundry云平台的身份验证和管理服务终端。 Cloud Foundry UAA存在安全漏洞，该漏洞源于私钥暴露，可能导致EC私钥通过公共/token_keys端点意外暴露。以下版本受到影响：uaa_release v76.12.0版本至v78.12.0版本和CF Deployment v30.0.0版本至v56.0.0版本。

CVSS 10.0 · Critical EPSS 0.35% · P28

Possible ATT&CK Techniques 1 AI

T1530 · Data from Cloud Storage

Affected Version Matrix 2

VendorProduct Version RangeStatus
Cloud Foundry Foundation CF Deployment 30.0.0< 56.1.0 affected
Cloud Foundry Foundation uaa_release 76.12.0< 78.13.0 affected
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I. Basic Information for CVE-2026-40965

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure. The server contains a vulnerability where EC (Elliptic Curve) private keys are inadvertently exposed through the public /token_keys endpoint. This endpoint is designed to provide public key material for JWT token verification but incorrectly exposes private key components for EC keys. The vulnerability affects deployments using EC keys for JWT token signing. The vulnerability does not affect RSA key configurations, only deployments using EC keys for JWT signing. Affected versions: - uaa_release: v76.12.0 through v78.12.0 (inclusive); fixed in v78.13.0 or later - CF Deployment: v30.0.0 through v56.0.0 (inclusive); fixed in v56.1.0 or later (bundles uaa_release v78.13.0)
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:H/I:H/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
信息暴露
Source: CVE Program / CVE List V5
Vulnerability Title
Cloud Foundry UAA 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Cloud Foundry UAA是美国Cloud Foundry基金会的一款应用于CloudFoundry云平台的身份验证和管理服务终端。 Cloud Foundry UAA存在安全漏洞，该漏洞源于私钥暴露，可能导致EC私钥通过公共/token_keys端点意外暴露。以下版本受到影响：uaa_release v76.12.0版本至v78.12.0版本和CF Deployment v30.0.0版本至v56.0.0版本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Cloud Foundry Foundation uaa_release 76.12.0 ~ 78.13.0 -
Cloud Foundry Foundation CF Deployment 30.0.0 ~ 56.1.0 -

II. Public POCs for CVE-2026-40965

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III. Intelligence Information for CVE-2026-40965

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Security Blog Posts for CVE-2026-40965 (1)

IV. Related Vulnerabilities

Same vendor: Cloud Foundry Foundation
Same weakness: CWE-200

V. Comments for CVE-2026-40965

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