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  4. CVE 2026 105820 vault acl policy cache vulnerable to cross
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Back to active CVEs
Medium · CVSS 5.4CVE-2026-105820

Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy ResolutionCVE-2026-105820

Answer in brief

CVE-2026-105820 records a Medium severity (CVSS 5.4) vulnerability in Vault ACL Policy Cache Vulnerable to Cross-Namespace Policy Resolution. The current sources do not mark it as known exploited. The current feed maps HashiCorp/Vault Enterprise (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Oct 7, 2026Updated Oct 7, 2026Source checked Oct 7, 2026First seen by HOL Oct 7, 2026Material review Oct 7, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.4
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Available

Why this deserves its current priority

CVSS is 5.4. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps HashiCorp/Vault Enterprise (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
HashiCorp/Vault Enterprisegeneric>=0.0.1 <2.1.22.1.2

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for HashiCorp/Vault Enterprise.
  2. 2Review the reported fix. Update HashiCorp/Vault Enterprise to 2.1.2 if you use the affected versions. Test the change in a non-production environment first.

Evidence timeline and material changes

  1. Published upstream

    Oct 7, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Oct 7, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Oct 7, 2026

Sources and claim methodology

  • Source referencediscuss.hashicorp.com
Upstream source description

Vault's ACL policy cache allowed namespace traversal when policy names contained path traversal constructs. This may allow a token assigned specially crafted policy names to use the capabilities of policies defined in other namespaces, including the root namespace. This vulnerability (CVE-2026-105820) is fixed in Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23. Vault Community Edition does not support namespaces, and is not affected.

Quoted source text, attributed separately from HOL analysis.

Related CVEs

  • Vault Vulnerable to Arbitrary Code Execution via Plugin Catalog Entries Restored From Raft SnapshotsSame hashicorp/vault enterprise package
  • Vault PKI ACME Issues Certificate With Unvalidated SANsSame hashicorp/vault enterprise package
  • Vault ACL Policy Evaluation May Allow Bypass of Deny RestrictionsSame hashicorp/vault enterprise package
  • Cyrus-sasl: heap buffer overflow in cyrus-sasl add_to_challenge() allows malicious server to crash or compromise digest-md5 clientsSame generic ecosystem
  • Cluster-samples-operator: role reads all secrets in openshift-config, not just pull-secretSame generic ecosystem
  • AsyncHttpClient: Unbounded WebSocket permessage-deflate decompression enables a decompression-bomb denial of service when compression is enabledSame generic ecosystem

Record context

Vulnerability class
Path Traversal
EPSS
Not reported
CWE IDs
CWE-22
Source
CVE List V5
Source checked
Oct 7, 2026
References
1 linked source
Open source record