What is CVE-2018-19786?

CVE-2018-19786 is a high-severity vulnerability in Hashicorp Vault, classified under Insertion of Sensitive Information into Log File. CVSS score: 8.1/10. Published 2018-12-05.

How severe is CVE-2018-19786?

High severity. CVSS v3 base score is 8.1 out of 10.

Information disclosure in Hashicorp Vault

CVE-2018-19786

HashiCorp Vault before 1.0.0 writes the master key to the server log in certain unusual or misconfigured scenarios in which incorrect data comes from the autoseal mechanism without an error being reported.

Published 2018-12-05 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 8.1 (High). Vector: CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.

EPSS exploit prediction

EPSS: 0.009 (59.2th percentile), scored 2026-09-30.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 59th percentile — 59.2% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.009 · newest: 0.009 · change: 0.000

Affected products

Hashicorp Vault

Weakness classification (CWE)

CWE-532 — Insertion of Sensitive Information into Log File

References

github.com/hashicorp/vault/blob/master/CHANGELOG.md (Third Party Advisory, Release Notes)

Frequently asked questions

What is CVE-2018-19786?: CVE-2018-19786 is a high-severity vulnerability in Hashicorp Vault, classified under Insertion of Sensitive Information into Log File. CVSS score: 8.1/10. Published 2018-12-05.
How severe is CVE-2018-19786?: High severity. CVSS v3 base score is 8.1 out of 10.