CVE-2026-86196: Grav API Plugin before 1.0.20 Authentication Bypass via Host Header

Severity: high (CVSS 8.7 v4.0)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-09-05 · updated 2026-09-08
Weakness: CWE-290

Description

Grav API plugin versions before 1.0.20 build password reset links from the untrusted Host header in the forgot-password endpoint, allowing unauthenticated attackers to redirect reset tokens to attacker-controlled domains. Attackers can send password reset requests for any account with a malicious Host header, intercept the reset token from victim emails, and complete account takeover including super-admin accounts.

Affected products

getgrav grav-plugin-api: before 1.0.20 — fixed in 1.0.20

How to fix

Upgrade to a fixed version: getgrav grav-plugin-api 1.0.20. Check the vendor advisory for mitigations.

References

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