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CVE

CVE-2026-4525

HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization
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CVE

CVE-2026-4525

HashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization

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.

Package Versions Affected

Package Version
patch Availability
No items found.

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CVSS Version

Severity
Base Score
CVSS Version
Score Vector
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
0
-
3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
C
H
U
7.5
-
3.1
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H

Related Resources

No items found.

References

https://nvd.nist.gov/vuln/detail/CVE-2026-4525, https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344, https://github.com/hashicorp/vault

Severity

7.5

CVSS Score
0
10

Basic Information

Ecosystem
Base CVSS
7.5
EPSS Probability
0.00026%
EPSS Percentile
0.07838%
Introduced Version
0.11.2,v0.11.2,v0.0.0-20181001192031-3058e9b86a65
Fix Available
v2.0.0,v0.0.0-20260324104240-9569be61c8ac

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