---
title: "CVE-2026-59358: Cloud Foundry UAA - Authentication Bypass"
description: "Cloud Foundry UAA contains an authentication bypass caused by improper verification of Bearer credentials in the OAuth token endpoint, letting remote authenticated attackers obtain fully-privileged client_credentials tokens, exploit requires attacker to have a valid user access token for a client supporting both public authorization and client_credentials grant."
url: https://panop.io/threat-heartbeat/CVE-2026-59358/
---

# CVE-2026-59358 Cloud Foundry UAA - Authentication Bypass

Cloud Foundry UAA contains an authentication bypass caused by improper verification of Bearer credentials in the OAuth token endpoint, letting remote authenticated attackers obtain fully-privileged client\_credentials tokens, exploit requires attacker to have a valid user access token for a client supporting both public authorization and client\_credentials grant.

CVSS base score 7.6 /10

High

CISA KEV

Not listed

Public exploit

Proof of concept available

Authentication

Required

EPSS

0.35% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-59358)

## Details

Type

Authentication Bypass

Impact

Privilege Escalation

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

Published

6 October 2026

Updated

15 October 2026

Weakness

[CWE-287](https://cwe.mitre.org/data/definitions/287.html)

## Vendor fix

Update to the latest version with fixed OAuth token endpoint authentication checks.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-59358](https://nvd.nist.gov/vuln/detail/CVE-2026-59358)
- [https://www.cloudfoundry.org/blog/cve-2026-59358-uaa-oauth-token-endpoint-vulnerability-allows-user-access-token-reuse-for-client\_credentials-grant-type/](https://www.cloudfoundry.org/blog/cve-2026-59358-uaa-oauth-token-endpoint-vulnerability-allows-user-access-token-reuse-for-client_credentials-grant-type/)

[← All CVEs](https://panop.io/threat-heartbeat/)

## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

[Book a demo](https://panop.io/demo)