Vulnerability · Published Sep 5, 2026 · Assigned by VulnCheck

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

High 8.7

In plain English

A high-severity authentication bypass by spoofing in grav-plugin-api from getgrav. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 38% of all known vulnerabilities).

Severity (CVSS 4.0)8.7High

Exploit odds (30 days)0.4%top 62.0% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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 (as reported)

Vendor	Product	Versions
getgrav	grav-plugin-api	0 – before 1.0.20

Weakness: CWE-290 · Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

References

GitHub Security Advisory (GHSA-262p-56vv-7v5r) vendor-advisory
VulnCheck Advisory: Grav API Plugin before 1.0.20 Authentication Bypass via Host Header third-party-advisory