Information Disclosure in Cloud Foundry UAA (CVE-2026-40965)
Summary
Vulnerability in Cloud Foundry UAA (CVE-2026-40965). Confidential information can be exposed externally. Mitigation: upgrade to 78.13.0 or later.
Original description
The description as published by the source.
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: NIST National Vulnerability Database NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-40965 has been found in Cloud Foundry UAA.
Confidential information can be exposed externally. CVSS score: 10.0/10.
What to do: upgrade Cloud Foundry UAA to 78.13.0 or later.
If unsure, ask your IT team or search "Cloud Foundry UAA CVE-2026-40965" on the vendor's site.
CVE-2026-40965 (Cloud Foundry UAA) — CWE-200 / CVSS v3 10.0
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: 78.13.0 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
Information disclosure (CWE-200) exists in Cloud Foundry UAA.
Check the vendor advisory for the affected versions of Cloud Foundry UAA.
Severity: Critical (CVSS 10.0/10). Confidential information can be exposed externally.
Update to 78.13.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで Cloud Foundry UAA を使っているサービスとバージョンを洗い出す。
-
2Apply patch patch
Upgrade Cloud Foundry UAA to 78.13.0ステージング環境で 78.13.0 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
References
- web security@vmware.com
- web nvd.nist.gov
- web cloudfoundry.org
- web github.com