What’s Vulnerable › Vulnerabilities

CVE-2023-6337: Vault May be Vulnerable to a Denial of Service Through Memory Exhaustion When Handling Large HTTP Requests

• Severity: high (CVSS 7.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.8% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2023-12-08 · updated 2026-06-17
• Weakness: CWE-770

Description

HashiCorp Vault and Vault Enterprise 1.12.0 and newer are vulnerable to a denial of service through memory exhaustion of the host when handling large unauthenticated and authenticated HTTP requests from a client. Vault will attempt to map the request to memory, resulting in the exhaustion of available memory on the host, which may cause Vault to crash. Fixed in Vault 1.15.4, 1.14.8, 1.13.12.

Affected products

• HashiCorp Vault: through 1.12.0; from 1.13.0 before 1.13.12; from 1.14.0 before 1.14.8; from 1.15.0 before 1.15.4 — fixed in 1.13.12, 1.14.8, 1.15.4

How to fix

Upgrade to a fixed version: HashiCorp Vault 1.13.12, 1.14.8, 1.15.4. Check the vendor advisory for mitigations.

References

• https://discuss.hashicorp.com/t/hcsec-2023-34-vault-vulnerable-to-denial-of-service-through-memory-exhaustion-when-handling-large-http-requests/60741
• https://security.netapp.com/advisory/ntap-20240112-0006/
• https://discuss.hashicorp.com/t/hcsec-2023-34-vault-vulnerable-to-denial-of-service-through-memory-exhaustion-when-handling-large-http-requests/60741
• https://security.netapp.com/advisory/ntap-20240112-0006/

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