CVE-2026-4525: fallo de gravedad alta en HashiCorp Vault
Vault Token Leaked to Backends via Authorization: Bearer Passthrough Header
Publicada el · Actualizada el
Aviso por correo cuando entre en el KEV, tenga PoC pública o suba de nota.
21Vexday Risk Score
Sin señal de explotación. Ningún artefacto público de explotación conocido hasta ahora.
ssvc Trackcvss 7.5epss 0.4%
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.
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:H/I:H/A:H
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Referencias
https://access.redhat.com/security/cve/CVE-2026-4525https://bugzilla.redhat.com/show_bug.cgi?id=2459107https://discuss.hashicorp.com/t/hcsec-2026-07-vault-may-expose-tokens-to-auth-plugins-due-to-incorrect-header-sanitization/77344https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-4525.json