CVE-2026-4525HIGH 8.8EPSS p22.4%

CVE-2026-4525CVE-2026-4525

Description

If a Vault auth mount is configured to pass through the "Authorization" header, and the "Authorization" header is used to authenticate to Vault, Vault forwarded the Vault token to the auth plugin backend. Fixed in 2.0.0, 1.21.5, 1.20.10, and 1.19.16.

Scoring

CVSS 3.18.8 (HIGH)
VectorCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS0.31% probability of exploitation · percentile 22.4% · 2026-06-19T12:03:05Z
Published2026-04-17
Last modified2026-04-27

Underlying weaknesses· 1

CWE-201

References

  1. https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344

1

TypeTargetConfidenceTier
WeaknessInsertion of Sensitive Information Into Sent Datacwe-2010%live

Related by meaning· 6

Nearest entities by semantic similarity across the cs-graph corpus.

CVE
CVE-2025-11621
CVE
CVE-2026-5052
CVE
CVE-2026-43585
CVE
CVE-2025-3879
CVE
CVE-2026-3605
CVE
CVE-2026-35051
Sourced from NVD + FIRST.org EPSS. Curated for EU compliance use cases by Adam Lundqvist, Founder at SQUR.