---
id: "CVE-2026-123196"
kind: "vulnerability"
aliases: ["CVE-2026-123196"]
title: "Authorizer: password reset poisoning lets attackers take over accounts"
severity: "high"
cvss: 8.6
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["authentication", "authorizer", "grpc", "package", "self-hosted"]
not_affected_if: ["no-external-grpc-access", "version-2.4.2-or-later"]
published_at: "2026-11-05T19:17:17+00:00"
first_seen_at: "2026-11-05T19:40:35+00:00"
updated_at: "2026-11-05T19:42:43+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-123196", "first_seen_at": "2026-11-05T19:40:35+00:00"}]
exploit_sources: []
---

# Authorizer: password reset poisoning lets attackers take over accounts

Authorizer before 2.4.2 builds emailed password reset and magic links using a host supplied in x-authorizer-url gRPC metadata or a Grpc-Metadata-X-Authorizer-Url header. An unauthenticated attacker can point those links at a host they control, capture the reset or magic-link token, and take over accounts.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the Authorizer version in use; releases before `2.4.2` are affected.
- Check whether the gRPC port or the REST gateway is reachable from untrusted networks.
- Check whether the gateway forwards a Grpc-Metadata-X-Authorizer-Url header from clients.

## Fix

- Authorizer: upgrade to `2.4.2` or later.

## Timeline

- 2026-11-05T19:40:35+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-123196

## Documents

- [advisory] Vendor advisory: github.com https://github.com/authorizerdev/authorizer/security/advisories/GHSA-m46m-j9p5-5j99
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/authorizer-before-2.4.2-password-reset-poisoning-via-x-authorizer-url-grpc-metadata
- [fix] Patch: github.com https://github.com/authorizerdev/authorizer/commit/b5012cbcdc7c32dcb4bd43179a212055e7fcb863
- [fix] Release notes: github.com https://github.com/authorizerdev/authorizer/releases/tag/2.4.2

## From the sources

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.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_