High severity · published Jun 1, 2026
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…
7.5
CVSS
0.4%
EPSS
No
On KEV
Description
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)
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
High
Integrity
None
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.4% · higher than 33% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CD
CF Deployment · Cloud Foundry Foundation
12.44.0 through 55.2.0 · source: vendor
LO
log-cache_release · Cloud Foundry Foundation
2.7.0 through 3.2.6 · source: vendor
Affected product
CD
CF Deployment
Cloud Foundry Foundation
More from CF Deployment
10.0
CVE-2026-40965
Cloud Foundry UAA versions v76.12.0 through v78.12.0 are vulnerable to a private key exposure
9.2
CVE-2026-47839
Federated OIDC Users Can Bypass externalGroupsWhitelist to Gain uaa.admin