---
id: CVE-2026-123196
title: >-
  Authorizer before 2.4.2 Password Reset Poisoning via x-authorizer-url gRPC
  metadata
summary: >-
  Authorizer before 2.4.2 contains a password reset poisoning vulnerability that
  allows unauthenticated attackers to control emailed link hosts by supplying
  x-authorizer-url gRPC metadata. Attackers can send this metadata to the gRPC
  port …
severity: high
cvss: 8.1
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N'
cvssSource: cna
cwe:
  - CWE-640
vendor: authorizerdev
product: authorizer
affected:
  - authorizer >= 2.3.0-rc.3 < 2.4.2
published: '2026-11-05'
updated: '2026-11-05'
sourceUpdated: '2026-11-05T18:16:34.386Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-123196'
references:
  - url: >-
      https://github.com/authorizerdev/authorizer/security/advisories/GHSA-m46m-j9p5-5j99
    label: GitHub Security Advisory (GHSA-m46m-j9p5-5j99)
  - url: 'https://github.com/authorizerdev/authorizer/pull/814'
  - url: >-
      https://github.com/authorizerdev/authorizer/commit/b5012cbcdc7c32dcb4bd43179a212055e7fcb863
  - url: 'https://github.com/authorizerdev/authorizer/releases/tag/2.4.2'
    label: authorizer 2.4.2 Release Notes
  - url: >-
      https://github.com/authorizerdev/authorizer/blob/0bceb94f0ab726d9c396202f4d8fbedee1dc9cab/internal/grpcsrv/transport/grpc_metadata.go#L40
  - url: >-
      https://github.com/authorizerdev/authorizer/blob/0bceb94f0ab726d9c396202f4d8fbedee1dc9cab/internal/gateway/mount.go#L244-L248
  - url: >-
      https://www.vulncheck.com/advisories/authorizer-before-2.4.2-password-reset-poisoning-via-x-authorizer-url-grpc-metadata
    label: >-
      VulnCheck Advisory: Authorizer before 2.4.2 Password Reset Poisoning via
      x-authorizer-url gRPC metadata
tags:
  - cve.org
ingestedAt: '2026-11-05T22:38:31.454Z'
---

## Overview

Authorizer before 2.4.2 contains a password reset poisoning vulnerability that allows unauthenticated attackers to control emailed link hosts by supplying x-authorizer-url gRPC metadata. Attackers can send this metadata to the gRPC port or a Grpc-Metadata-X-Authorizer-Url header through the REST gateway to capture reset or magic-link tokens and take over accounts.

## Affected

- `authorizer >= 2.3.0-rc.3 < 2.4.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.