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CVE-2026-59396medium6.9

DoS Vulnerability in UAA Related to JWKS URI Handling

Impact

A denial-of-service vulnerability exists in UAA's private_key_jwt client-authentication mechanism. When UAA retrieves a remote JWKS URI, it caches the response. Invalid authentication attempts can trigger full deserialization of this cached data. An attacker with prerequisites (write access to clients or a compromised endpoint) can send anonymous requests that force repeated parsing of large cached objects, causing excessive CPU usage and potential Java heap exhaustion via OutOfMemoryError, resulting in service unavailability.

Source excerpt · vmware

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

Cloud Foundry · vmware

UAA

1 range
vmware version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

76.23.0 → before 79.9.0

OSS versions

unaffected

unknown

Other versions: unknown

Cloud Foundry · vmware

cf-deployment

1 range
vmware version evidence

Compare with this publisher’s ranges. This does not inspect your installation.

affected

0 → before 60.11.0

oss versions

unaffected

unknown

Other versions: unknown

Original source description

A denial-of-service vulnerability exists in UAA's private_key_jwt client-authentication mechanism. When UAA retrieves a remote JWKS URI, it caches the response. Invalid authentication attempts can trigger full deserialization of this cached data. An attacker with prerequisites (write access to clients or a compromised endpoint) can send anonymous requests that force repeated parsing of large cached objects, causing excessive CPU usage and potential Java heap exhaustion via OutOfMemoryError, resulting in service unavailability.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-59396

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-400 ↗

CWE-400 Uncontrolled Resource Consumption

CISA-ADP

Related →
Contributing organizations · 2
vmware

Assigning organization

2026-10-30
CISA-ADP

Additional data publisher

2026-10-30

What changed

Follow changes
  1. CVE · CVE-2026-59396

    Observed 2026-10-30T20:23:56.758Z · upstream updated 2026-10-30T20:10:01.484Z

    Weakness classification changed

    before

    []

    after

    [
  {
    "id": "CWE-400",
    "description": "CWE-400 Uncontrolled Resource Consumption",
    "source": "CISA-ADP"
  }
]
  2. CVE · CVE-2026-59396

    Observed 2026-10-30T17:16:50.389Z · upstream updated 2026-10-30T15:47:46.720Z

    Prioritization updated

    before

    []

    after

    [
  {
    "source": "CISA-ADP",
    "type": "SSVC",
    "role": "CISA Coordinator",
    "timestamp": "2026-10-30T15:28:01.628068Z",
    "decisions": [
      {
        "name": "Exploitation",
        "value": "none"
      },
      {
        "name": "Automatable",
        "value": "no"
      },
      {
        "name": "Technical Impact",
        "value": "partial"
      }
    ]
  }
]

Large field values are marked as truncated previews. Original source snapshots remain retained.

Showing up to 50 most recent observed changes.

References

1 sources
www.cloudfoundry.org/blog/cve-2026-59396-dos-vulnerability-in-uaa-related-to-jwks-uri-handling-2/
Security advisoryvmware