CVE-2026-4525 (GCVE-0-2026-4525)

Vulnerability from cvelistv5 – Published: 2026-04-17 03:00 – Updated: 2026-04-17 17:22
VLAI?
Title
Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header
Summary
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.
Severity ?
7.5 (High)
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
CWE
  • CWE-201 - Insertion of Sensitive Information Into Sent Data
Assigner
References
Impacted products
Vendor Product Version
HashiCorp Vault Affected: 0.11.2 , < 2.0.0 (semver)
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    HashiCorp Vault Enterprise Affected: 0.11.2 , < 2.0.0 (semver)
Create a notification for this product.
Credits
This issue was identified and reported by Oleh Konko of 1seal.
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  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
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  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



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