What is CVE-2023-5954?

CVE-2023-5954 is a medium-severity vulnerability in Hashicorp Vault, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.9/10. Published 2023-11-09.

How severe is CVE-2023-5954?

Medium severity. CVSS v3 base score is 5.9 out of 10.

Vulnerability in Hashicorp Vault

CVE-2023-5954

HashiCorp Vault and Vault Enterprise inbound client requests triggering a policy check can lead to an unbounded consumption of memory. A large number of these requests may lead to denial-of-service. Fixed in Vault 1.15.2, 1.14.6, and 1.13.10.

Published 2023-11-09 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.9 (Medium). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.007 (52.0th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 52nd percentile — 52.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.007 · newest: 0.007 · change: 0.000

Affected products

Hashicorp Vault — versions 1.15.0, 1.15.1, 1.14.3
Hashicorp Vault Enterprise — versions 1.15.0, 1.15.1, 1.14.3

Weakness classification (CWE)

CWE-401 — Missing Release of Memory after Effective Lifetime

References

Frequently asked questions

What is CVE-2023-5954?: CVE-2023-5954 is a medium-severity vulnerability in Hashicorp Vault, classified under Missing Release of Memory after Effective Lifetime. CVSS score: 5.9/10. Published 2023-11-09.
How severe is CVE-2023-5954?: Medium severity. CVSS v3 base score is 5.9 out of 10.