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TI-2026-04407 Aliases CVE-2026-5052GHSA-8r5m-3f66-qpr3

Vault Vulnerable to Server-Side Request Forgery in ACME Challenge Validation via Attacker-Controlled DNS

Priority MEDIUM 43CWE-918Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Information disclosure
Confidentiality · integrity · availability
High · None · None
Fix status
Partial Red Hat: 2 without a fix

Attack profile from CVSS 3.1 · NVD. Fix status from CNA, GitHub and Red Hat. Impact type from CWE-918 and the CVSS impact.

Summary

Vault’s PKI engine’s ACME validation did not reject local targets when issuing http-01 and tls-alpn-01 challenges. This may lead to these requests being sent to local network targets, potentially leading to information disclosure. Fixed in Vault Community Edition 2.0.0 and Vault Enterprise 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00345 28th percentileScored 2026-11-07
Fix Partial Vault (HashiCorp): 2.0.0Vault Enterprise (HashiCorp): 2.0.0Red Hat: 2 without a fix

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
HashiCorpVault1.15.0 to before 2.0.02.0.0Patch availableCNA
HashiCorpVault Enterprise1.15.0 to before 2.0.02.0.0Patch availableCNA
—github.com/hashicorp/vault (Go)1.14.0 – 1.21.4—No fix listedGHSA-8r5m-3f66-qpr3
  • Vault VendorHashiCorp Affected 1.15.0 to before 2.0.0 Fixed in 2.0.0 Patch available CNA
  • Vault Enterprise VendorHashiCorp Affected 1.15.0 to before 2.0.0 Fixed in 2.0.0 Patch available CNA
  • github.com/hashicorp/vault (Go) Vendor— Affected 1.14.0 – 1.21.4 Fixed in — No fix listed GHSA-8r5m-3f66-qpr3

CPE configurations NVD · 3

CPEVersionsRoleVendor
cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*1.14.0 to before 1.19.16VulnerableHashiCorp
cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:*1.14.0 to before 2.0.0VulnerableHashiCorp
cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:*1.20.0 to before 1.20.10; 1.21.0 to before 1.21.5VulnerableHashiCorp
  • cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:* Versions 1.14.0 to before 1.19.16 Vulnerable ·HashiCorp
  • cpe:2.3:a:hashicorp:vault:*:*:*:*:-:*:*:* Versions 1.14.0 to before 2.0.0 Vulnerable ·HashiCorp
  • cpe:2.3:a:hashicorp:vault:*:*:*:*:enterprise:*:*:* Versions 1.20.0 to before 1.20.10; 1.21.0 to before 1.21.5 Vulnerable ·HashiCorp

Remediation

  • Fix · CNA Vault (HashiCorp) Fixed in 2.0.0
  • Fix · CNA Vault Enterprise (HashiCorp) Fixed in 2.0.0

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    HashiCorp Vault 2.0.0

    4 records Highest priority Priority MEDIUM 3 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-05088 Vault Vulnerable to Denial-of-Service via Unauthenticated Root Token Generation/Rekey OperationsPriority MEDIUM 40
    • TI-2026-03930 Vault Token Leaked to Backends via Authorization: Bearer Passthrough HeaderPriority MEDIUM 40
    • TI-2026-03109 Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial-of-ServicePriority LOW 37
    Show all 4 records →
  • Release ·

    HashiCorp Vault Enterprise 2.0.0

    3 records Highest priority Priority MEDIUM 2 MEDIUM, 1 LOW

    Other records, highest priority first

    • TI-2026-03930 Vault Token Leaked to Backends via Authorization: Bearer Passthrough HeaderPriority MEDIUM 40
    • TI-2026-03109 Vault KVv2 Metadata and Secret Deletion Policy Bypass Denial-of-ServicePriority LOW 37
    Show all 3 records →

Vendor assessments

Red Hat

Red Hat rating: Moderate. Red Hat's page for this CVE →

ProductStatusPlan or fix
Red Hat OpenShift Container Platform 4AffectedNo fix yet: Fix deferred
Red Hat Openshift Data Foundation 4AffectedNo fix yet: Fix deferred

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-5052
  2. 2026-10-03 Alias added: GHSA-8r5m-3f66-qpr3

References

Advisory 3

Other 1

  • TI-2024-01904 Vault Cert Auth Method Did Not Correctly Validate Non-CA Certificates CVSS 3.1CRITICAL 9.8
  • TI-2022-19053 An issue was discovered in HashiCorp Vault and Vault Enterprise before 1.11.3. CVSS 3.1CRITICAL 9.1
  • TI-2020-17874 The official vault docker images before 0.11.6 contain a blank password for a root user. CVSS 3.1CRITICAL 9.8
  • TI-2020-10142 HashiCorp Vault and Vault Enterprise 1.4.0 and 1.4.1, when configured with the GCP… CVSS 3.1CRITICAL 9.8
  • TI-2025-05421 Arbitrary Remote Code Execution via Plugin Catalog Abuse CVSS 3.1CRITICAL 9.1
  • TI-2022-16551 HashiCorp Vault Enterprise 1.7.0 through 1.9.7, 1.10.4, and 1.11.0 clusters using… CVSS 3.1CRITICAL 9.1
See all 71 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences