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Advisory record · GHSA-6c5r-4wfc-3mcx

Hashicorp Vault has Incorrect Validation for Non-CA Certificates

CVSS 6.8 MediumEPSS 0.0027 · 19th percentile

Published by the GitHub Advisory Database at 1 Aug 2025, 18:31 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

PackageEcosystemAffectedFixed in
github.com/hashicorp/vaultGo<1.20.11.20.1
Identifiers
GHSA-6c5r-4wfc-3mcx · BIT-vault-2025-6037 · CVE-2025-6037 · GO-2025-3836
Weakness (CWE)
CWE-295
Tags
Published
1 Aug 2025
Updated
10 Sept 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Hashicorp Vault versions before 1.20.1 do not correctly validate client certificates in the TLS certificate auth method when a non-CA certificate is configured as a trusted certificate. An attacker who can present a crafted certificate may be able to impersonate another user. Upgrade to Vault 1.20.1 or a later fixed release.

Written 1 Nov 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

ScoreRatingCVSSVectorSource
6.8 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:H CNA (HashiCorp)
  • CISA KEV Not listed.
  • EPSS 0.0027, the 19th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:14 UTC First seen by agentprime
  2. 31 Oct 2026, 14:14 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.