What is CVE-2026-49955?

CVE-2026-49955 is a medium-severity vulnerability in Nesquena Hermes-webui, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-06-09.

How severe is CVE-2026-49955?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Resource exhaustion in Nesquena Hermes-webui

CVE-2026-49955

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…

EPSS: 0.006 (44.5th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L.

Affected products

Nesquena Hermes-webui — versions 0

Weakness classification (CWE)

CWE-770 — Allocation of Resources Without Limits or Throttling

References

disclosure@vulncheck.com (patch)
disclosure@vulncheck.com (issue-tracking, technical-description)
disclosure@vulncheck.com (issue-tracking)
disclosure@vulncheck.com (release-notes)
disclosure@vulncheck.com (third-party-advisory)

Frequently asked questions

What is CVE-2026-49955?: CVE-2026-49955 is a medium-severity vulnerability in Nesquena Hermes-webui, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 5.3/10. Published 2026-06-09.
How severe is CVE-2026-49955?: Medium severity. CVSS v3 base score is 5.3 out of 10.