High 8.1Published Oct 23, 2025

CVE-2025-11621Vault AWS auth method bypass due to AWS client cache

Updated under an hour ago (Oct 28, 2026, 4:23 AM ET)

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It affects HashiCorp Vault and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Exploited in the last 30 days

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: 8.1 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N
Weakness (CWE): CWE-288
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: HashiCorp
NVD analysis: Analyzed
Record last updated: Feb 26, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

HashiCorp Vault hashicorp:vault (from the name)	from 0.6.0 before 1.21.0	CNA record
HashiCorp Vault Enterprise hashicorp:vault_enterprise (from the name)	from 0.6.0 before 1.21.0; fixed at 1.20.5, fixed at 1.19.11, fixed at 1.16.27	CNA record
hashicorp vault hashicorp:vault	from 0.6.0 before 1.16.27; from 0.6.0 before 1.21.0; from 1.18.0 through 1.18.15; from 1.19.0 before 1.19.11; from 1.20.0 before 1.20.5	NVD

References

References

https://discuss.hashicorp.com/t/hcsec-2025-30-vault-aws-auth-method-authentication-bypass-through-mishandling-of-cache-entries/76709	vendor-advisory

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.