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VulnerabilityPublished Updated

CVE-2026-40965: Cloud Foundry Foundation uaa_release · Information Exposure

Affects Cloud Foundry Foundation uaa_releaseSource CVE Database V5

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Not known to be exploited · CVSS 10.0 Critical : upgrade to 78.13.0 as a priority.

Data as of 30 Oct 2026, 06:59 UTC

CVSS 4.0 base score
10.0Critical
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.3% chance of exploitation in 30 days – higher than 28% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available – fixed in 78.13.0, 56.1.0
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:L/SC:H/SI:H/SA:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 1 Jun 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Upgrade uaa_release to 78.13.0; CF Deployment to 56.1.0.

Affected software

ProductAffectedFixed in
Cloud Foundry Foundationuaa_releaseAffected
  • >=76.12.0 <78.13.0
Fixed in
  • 78.13.0
Cloud Foundry FoundationCF DeploymentAffected
  • >=30.0.0 <56.1.0
Fixed in
  • 56.1.0

AI-suggested

A fix is available and should be applied by upgrading to uaa_release version 78.13.0 or later. For Cloud Foundry deployments, upgrade to version 56.1.0 or later, which bundles the patched uaa_release. Deployments using EC keys for JWT signing must prioritize this update to prevent private key exposure. RSA key configurations are not affected by this vulnerability. Patch status is confirmed by the vendor advisory specifying fixed versions.

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)

References

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