CVE-2026-49955: Allocation of Resources Without Limits or Throttling in nesquena hermes-webui
Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the authentication endpoint, causing unbounded growth of the challenge store file and excessive CPU and disk I/O through repeated JSON file rewrites.
CVE-2026-49955: Allocation of Resources Without Limits or Throttling in nesquena hermes-webui
Description
Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade service availability by repeatedly calling the passkey options endpoint without completing assertion. Attackers can send unlimited POST requests to the authentication endpoint, causing unbounded growth of the challenge store file and excessive CPU and disk I/O through repeated JSON file rewrites.
CVSS v4.0
Score 6.9medium
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- VulnCheck
- Date Reserved
- 2026-06-02T16:30:15.232Z
- Cvss Version
- 4.0
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a283e9b8dd33fbd8553f4a9
Added to database: 6/9/2026, 4:26:03 PM
Last updated: 6/9/2026, 4:26:34 PM
Views: 1
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