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CVE-2025-11621

Vault AWS auth method bypass due to AWS client cache

HIGH
8.1
CVSS Score
Published: October 23, 2025 at 07:08 PM UTC
Updated: October 18, 2026 at 09:10 PM UTC
1 product affected across 1 vendorVault

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Severity
HIGH8.1
Exploit prediction
EPSS 0.5%
SSVC
No known exploit

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

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

Vault· Hashicorp
95%
0.6.0 ≤ v < 1.16.270.6.0 ≤ v < 1.21.01.18.0 ≤ v ≤ 1.18.151.19.0 ≤ v < 1.19.111.20.0 ≤ v < 1.20.50.6.0
Affected range stops below 1.21.0, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor Advisory
Source: [email protected]
https://discuss.hashicorp.com/t/hcsec-2025-30-vault-aws-auth-method-authentication-bypass-through-mishandling-of-cache-entries/76709

SSVC — Action Prioritization

SSVCNo known exploitNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.1HIGHHashiCorp
Vector?

Quick Info

StatusANALYZED
CWE
CWE-288

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