Authorizer Password Reset Poisoning via x-authorizer-url gRPC Metadata
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- Passive
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Security bypass
- Confidentiality · integrity · availability
- High · High · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-640.
Summary
Authorizer from 2.3.0-rc.3 before 2.4.2 has a weak password recovery mechanism that lets unauthenticated attackers control the host used in emailed links. An attacker supplies x-authorizer-url gRPC metadata, or a Grpc-Metadata-X-Authorizer-Url header through the REST gateway, so reset or magic-link tokens are sent to a host the attacker chooses. Successful capture of these tokens lets the attacker take over accounts, and user interaction is required.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
Description from the CNA
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.
Why it matters now
SSVC decision points
Not available: CISA has not published SSVC decision points for this record.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| authorizerdev | authorizer | 2.3.0-rc.3 to before 2.4.2 | 2.4.2 | Patch available | CNA |
- authorizer Vendorauthorizerdev Affected 2.3.0-rc.3 to before 2.4.2 Fixed in 2.4.2 Patch available CNA
Remediation
Upgrade authorizerdev authorizer to version 2.4.2. Red Hat lists one product as not affected and names no fixed version for it.
Written with Claude Haiku 5.5 from the sources below · 2026-11-06
- Fix · CNA authorizer (authorizerdev) Fixed in 2.4.2
Vendor assessments
Timeline
- 2026-11-05 Threatist record created from CVE-2026-123196
- 2026-11-05 Alias added: GHSA-4q96-hqv8-w3gh
- 2026-11-06 Affected versions changed · Red Hat
- 2026-11-06 CVSS score added · Red Hat
- 2026-11-07 Priority changed: MEDIUM → LOW
References
Patch 2
More authorizerdev vulnerabilities
- TI-2026-39003 Authorizer: Unvalidated redirect_uri in /authorize leaks OAuth2 tokens to attacker-controlled URL CVSS 3.1CRITICAL 9.3
Sources
- CVE-2026-123196 · CVE Program
- CVE-2026-123196 · NVD
- FIRST EPSS
- GHSA-4q96-hqv8-w3gh · GitHub Advisory Database · CC BY 4.0
- CVE-2026-123196 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences