Identity CVE · Secrets managers
CVE-2025-6011Vault timing side-channel username enumeration
medium
What broke
Vault took a measurably different amount of time to reject an unknown username versus a known one. That is a timing side-channel for username enumeration, next to the explicit error leak in CVE-2025-6010. Fixed in 1.20.2.
Why it matters
Closing the error string and leaving the timing is how enumeration advisories come back a quarter later. Take both IDs in the same change.
What to do
- Upgrade. If you still expose Userpass, pad auth responses to a constant time on your reverse proxy as defense in depth.
- Prefer SSO. Enumeration only matters if the attacker can hit the login method.
Sources
Related identity CVEs
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Compiled from vendor advisories, NVD, CISA KEV, and public research. CVSS figures can disagree across NVD and the CNA. Confirm affected versions against the vendor advisory before you patch. Independent, community-driven analysis. See the disclaimer.