CVE Watch14 jul 2026

CVE-2026-49955

Hermes WebUI before version 0.51.270 contains a resource exhaustion vulnerability that allows unauthenticated remote attackers to degrade se

CVSS

5.3

Medio

EPSS

0.6%

p44

KEV

—

Exploit Today

0-100

Publicado: 9 jun 2026 · Última mod.: 14 jul 2026 · CWE-770

EPSS · 30d

0.6%EPSS · 30 días0.6%

2026-06-302026-07-17

Descripción técnica

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.

Referencias oficiales

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