Is there a public exploit for CVE-2026-128100?

No public exploit for CVE-2026-128100 was found in Exploit-DB, Metasploit, Nuclei templates or public proof-of-concept repositories. That is an absence of evidence rather than proof that none exists.

How severe is CVE-2026-128100?

CVE-2026-128100 scores CVSS 6.5 (v3.1), rated medium.

What does CVE-2026-128100 affect?

CVE-2026-128100 affects Hashicorp Vault, Vault Enterprise.

6.5 Medium

Vault Community Edition and Vault Enterprise did not apply explicit ACL policy deny rules to letter case variants of user and group names…

CVE-2026-128100

Vault Community Edition and Vault Enterprise did not apply explicit ACL policy deny rules to letter case variants of user and group names in auth methods that treat these names as case-insensitive. This may allow an authenticated user with delegated permissions to modify a protected user or group, potentially leading to privilege escalation. This vulnerability (CVE-2026-128100) is fixed in Vault Community Edition 2.2.2 and Vault Enterprise 2.2.2, 1.21.14, and 1.19.25.

Assessment

CVSS: 6.5 (v3.1)
Severity: Medium
Known exploited: Not listed in CISA KEV
Exploit availability: Nothing found in Exploit-DB, Metasploit, Nuclei or public PoC repositories
Published: 13 November 2026
Last updated: 13 November 2026
Affected: Hashicorp · Vault · Vault Enterprise
Assigner: HashiCorp

CVSS vectorCVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:U/C:N/I:H/A:H

At the source

EUVD (ENISA)

References

https://discuss.hashicorp.com/t/hcsec-2026-58-vault-vulnerable-to-acl-deny-bypass-via-case-variant-auth-method-user-and-group-names/78256

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