CVE-2026-4525High· 7.5▾ TwilightHashiCorp Vault May Expose Tokens to Auth Plugins Due to Incorrect Header Sanitization
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Jul 21.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via OSV
0.4%
Last analysed / modified upstream
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.
github.com/hashicorp/vault >= 0.11.2, <= 1.21.4Refer to the advisory for the patched release.
Connected by shared product, vendor, weakness, or advisory.
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