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CVE-2026-105820

MEDIUM 5.4

Published 2026-10-07 · Last modified 2026-10-08

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.

NO EXPLOITATION SIGNALS

No known exploitation, public exploit, or elevated probability at this time. Track for changes.

Exploitation likelihood

0.2%chance of exploitation in 30 days · 16th percentile

○ In CISA KEV ○ Catalogued PoC

Impact if exploited

5.4CVSS 3.1 · MEDIUM

  • ConfidentialityLow
  • IntegrityLow
  • AvailabilityNone

What an attacker needs

  • ✓Access: Reachable over the network — no local access needed
  • ⚠Privileges: Requires a low-privilege account
  • ✓User interaction: No user interaction needed
  • ✓Complexity: No special conditions — reliably repeatable

✓ lowers the bar for an attacker · ⚠ raises it

Proof of concept

No public PoC is currently catalogued.

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Data snapshot:

Affected

Vendors Hashicorp

Products Vault Enterprise

Weakness (CWE)

  • CWE-22: : Improper Limitation of a Pathname to a Restricted Directory (Path Traversal)

CVSS vector

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

References and research data (JSON)

Vendor product assessments

  • odf4/cephcsi-rhel9 as a component of Red Hat Openshift Data Foundation 4 · under investigation

    Vendor assessment for this product only.

    pkg:oci/cephcsi-rhel9?repository_url=registry.redhat.io/odf4/cephcsi-rhel9

    Red Hat · CVE-2026-105820 · Updated 2026-10-16T15:32:49+00:00
  • odf4/mcg-cli-rhel9 as a component of Red Hat Openshift Data Foundation 4 · under investigation

    Vendor assessment for this product only.

    pkg:oci/mcg-cli-rhel9?repository_url=registry.redhat.io/odf4/mcg-cli-rhel9

    Red Hat · CVE-2026-105820 · Updated 2026-10-16T15:32:49+00:00
  • odf4/mcg-rhel9-operator as a component of Red Hat Openshift Data Foundation 4 · under investigation

    Vendor assessment for this product only.

    pkg:oci/mcg-rhel9-operator?repository_url=registry.redhat.io/odf4/mcg-rhel9-operator

    Red Hat · CVE-2026-105820 · Updated 2026-10-16T15:32:49+00:00

All CVSS metrics

  • MEDIUM 5.4 v3.1 · CNA Primary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
  • MEDIUM 5.4 v3.1 · NVD Secondary
    CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N

References

Advisories

Technical & other

Sources: NVD · CVE.org · EPSS