PT-2026-47853 · Nesquena · Hermes-Webui

Published 2026-06-09 · Updated 2026-06-09 · CVE-2026-49955

NVD

CVSS v3.1

5.3

Medium

Base vector

AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L

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.

Fix

Allocation of Resources Without Limits

Weakness Enumeration

CWE-770

Related Identifiers

CVE-2026-49955

Affected Products

Hermes-Webui

References · 6

• https://github.com/nesquena/hermes-webui/commit/58528a4d88b0fa4f7b822e31d6051c669769bd3b · Patch
• https://nvd.nist.gov/vuln/detail/CVE-2026-49955 · Security Note
• https://github.com/nesquena/hermes-webui/pull/3624 · Note
• https://github.com/nesquena/hermes-webui/releases/tag/v0.51.270 · Note
• https://github.com/nesquena/hermes-webui/pull/3674 · Note
• https://vulncheck.com/advisories/hermes-webui-resource-exhaustion-via-passkey-options · Note