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Fencer Vulns
high 7.5

CVE-2023-6337 json

Vault May be Vulnerable to a Denial of Service Through Memory Exhaustion When Handling Large HTTP Requests

published 2023-12-08 2 y ago modified 2026-09-08 2 mo ago also BIT-vault-2023-6337 , EUVD-2023-3128 , GHSA-6p62-6cg9-f5f5 , GO-2023-2399

cvss
7.5
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.8%
EPSS 0.8% chance of exploitation in 30 days, percentile 56%
public exploits
0
none known

Summary

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.

Patch / fix

  • go github.com/hashicorp/vault 1.13.12, 1.14.8, 1.15.4
  • bitnami vault 1.13.12, 1.14.8, 1.15.4
  • HashiCorp Vault 1.13.2, 1.14.8, 1.15.4
  • HashiCorp Vault Enterprise 1.13.2, 1.14.8, 1.15.4
  • cert-manager Azure Linux 3.0 1.12.12-1

azure linux advisories AZL-34585

Azure Linux vulnerability data, Copyright (c) Microsoft Corporation, from https://github.com/microsoft/AzureLinuxVulnerabilityData via OSV, under the MIT licence; changed: normalised to fixed package versions per release. MIT

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2023-6337 updated cvss 7.5

hashicorp-vault: denial of service through memory exhaustion

  • Red Hat OpenShift Pipelines openshift-pipelines-client Red Hat build of Apache Camel for Spring Boot 4 rhint-camel-spring-boot rhint-camel-spring-boot Red Hat Openshift Data Foundation 4 mcg, odf4/cephcsi-rhel9, odf4/mcg-cli-rhel9, odf4/mcg-rhel9-operator, odf4/ocs-rhel9-operator, odf4/odf-rhel8-operator
    not affected: vulnerable code not present

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

Exploit prediction

0.79% chance of exploitation in the next 30 days, higher than 56% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
GitHub 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
NVD 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
OSV 3.1 7.5 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected packages

ecosystem package affected fixed in
go github.com/hashicorp/vault
>=1.15.0, <1.15.4
>=1.14.0, <1.14.8
>=1.12.0, <1.13.12
1.15.4
1.14.8
1.13.12
bitnami vault
>=1.13.0, <1.13.12
>=1.14.0, <1.14.8
>=1.15.0, <1.15.4
1.13.12
1.14.8
1.15.4

Affected products

  • HashiCorp Vault
  • HashiCorp Vault Enterprise

Classification

Weakness
  • CWE-770 Allocation of Resources Without Limits or Throttling

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.