High severity · published Oct 23, 2025
CVE-2025-11621
Vault AWS auth method bypass due to AWS client cache
8.1
CVSS
0.5%
EPSS
No
On KEV
Description
Vault and Vault Enterprise’s (“Vault”) AWS Auth method may be susceptible to authentication bypass if the role of the configured bound_principal_iam is the same across AWS accounts, or uses a wildcard. This vulnerability, CVE-2025-11621, is fixed in Vault Community Edition 1.21.0 and Vault Enterprise 1.21.0, 1.20.5, 1.19.11, and 1.16.27
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Attack vector
Network
Complexity
Low
Privileges
Low
User interaction
None
Confidentiality
High
Integrity
High
Availability
None
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.5% · higher than 42% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
VA
Vault · HashiCorp
0.6.0 before 1.21.0 · source: vendor, NVD
VE
Vault Enterprise · HashiCorp
0.6.0 before 1.21.0 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2025-11621
CVE.org
https://www.cve.org/CVERecord?id=CVE-2025-11621
Vendor Advisory
https://discuss.hashicorp.com/t/hcsec-2025-30-vault-aws-auth-method-authentication-bypass-through-mishandling-of-cache-entries/76709
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