CVE-2026-86196

Grav API Plugin before 1.0.20 Authentication Bypass via Host Header

HIGH
8.7
CVSS Score
Published: September 5, 2026 at 12:09 PM UTC
Updated: September 8, 2026 at 08:19 PM UTC
2 products affected across 1 vendorGravGrav Plugin API

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Severity
HIGH8.7
Exploit prediction
EPSS 0.4%
SSVC
PoC

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

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%
v < 1.0.20
Affected range stops below 1.0.20, so it looks safe — our inference, not a vendor statement
v < 1.0.20
Vendor states this is fixed in 1.0.20 (unaffected)

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

SSVC — Action Prioritization

SSVCPoCNot automatableTotal impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

8.7HIGHVulnCheck
Vector?

Quick Info

StatusDEFERRED
CWE
CWE-290

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