Auth bypass in Cloud Foundry Foundation Cf Deployment
CVE-2026-40964
Authentication Bypass in cf-auth-proxy in Cloud Foundry Foundation all installations allows an unauthenticated remote attacker to gain read access to every log and metric for every application and platform component via minting a JWT that the cf-auth-proxy accepts as a valid logs.admin token. Affected versions: - log-cache_release: all versions through v3.2.6 (inclusive); fixed in v3.2.7 or later - CF Deployment: all versions through v55.?.0 (inclusive); fixed in v55.?.0 or later (bundles log-cache_release v3.2.7)
Vulnerability class: Broken Authentication
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
EPSS: 0.006 (50.0th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 50.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.004 · newest: 0.006 · change: +0.003
Affected products
- Cloud Foundry Foundation Cf Deployment — versions 0, 12.44.0
- Cloud Foundry Foundation Log-Cache Release — versions 2.7.0, 0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-40964?
- CVE-2026-40964 is a high-severity vulnerability in Cloud Foundry Foundation Cf Deployment, classified under Improper Authentication. CVSS score: 7.5/10. Published 2026-06-01.
- How severe is CVE-2026-40964?
- High severity. CVSS v3 base score is 7.5 out of 10.