Cloud Foundry Logo
blog single gear
Security Advisory

CVE-2026-40964 – Read access to CF logs

Severity

7.5

AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N/E:P/RL:X/RC:X/CR:M/IR:X/AR:X/MAV:N/MAC:L/MPR:N/MUI:N/MS:U/MC:H/MI:N/MA:N

Vendor

CloudFoundry Foundation

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 validlogs.admintoken

Versions Affected

*Severity is high unless otherwise noted.

  • log-cache_release
    • All versions from v?.?.? to v3.2.6 (inclusive)
  • CF Deployment
    • All versions from v?.?.? to v55.?.0 (inclusive)

Mitigation

Users of affected products are strongly encouraged to follow the mitigations below.

The Cloud Foundry project recommends upgrading the following releases:

  • log-cache_release
    • Upgrade log-cache_release versions to v3.2.7 or greater
  • CF Deployment
    • Upgrade cf-deployment version to v55.?.0 or greater 
      • Includes log-cache_release v3.2.7

Credit

Self reported by the Cloud Foundry team

History

May 22nd: Initial vulnerability report published

 

Cloud Foundry Foundation Security Team Profile Image

Cloud Foundry Foundation Security Team, AUTHOR

SEE ALL ARTICLES