What’s Vulnerable › Vulnerabilities

CVE-2026-3605: Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial-of-Service

• Severity: high (CVSS 8.1 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.4% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-04-17 · updated 2026-10-26
• Weakness: CWE-288

Description

An authenticated user with access to a kvv2 path through a policy containing a glob may be able to delete secrets they were not authorized to read or write, resulting in denial-of-service. This vulnerability did not allow a malicious user to delete secrets across namespaces, nor read any secret data. Fxed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Affected products

• HashiCorp Vault: from 0.10.0 before 1.19.16; from 0.10.0 before 2.0.0; from 1.20.0 before 1.20.10; from 1.21.0 before 1.21.5 — fixed in 1.19.16, 2.0.0, 1.20.10, 1.21.5

How to fix

Upgrade to a fixed version: HashiCorp Vault 1.19.16, 2.0.0, 1.20.10, 1.21.5. Check the vendor advisory for mitigations.

References

• https://discuss.hashicorp.com/t/hcsec-2026-05-vault-kvv2-metadata-and-secret-deletion-policy-bypass-denial-of-service/77342
• https://access.redhat.com/security/cve/CVE-2026-3605
• https://bugzilla.redhat.com/show_bug.cgi?id=2459105
• https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-3605.json

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