Secuno
ENNL
Book demo

CVE-2026-53871

Hermes WebUI vulnerability

8.1 HIGHEPSS 0.50%
  1. Published17 Jun 2026

Description

Hermes WebUI before 0.51.368 contains an authorization bypass vulnerability in the get_profile_cookie() function that accepts unauthenticated profile names from the hermes_profile cookie. An authenticated attacker can forge the hermes_profile cookie value to bypass profile-scoped authorization checks and access sessions, files, and resources across different profiles.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredLow
User interactionNone
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityNone
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:N

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-761869.1
Apache Airflow Keycloak provider: from Airflow 3.3 the Keycloak auth manager takes a…
CVE-2026-851819.8
CAT uses Java String.hashCode as the sole integrity check for session cookies without…
CVE-2026-02579.1
Authentication bypass vulnerabilities in the GlobalProtect portal and gateway of Palo…
CVE-2026-393249.8
Rack::Session is a session management implementation for Rack. From 2.0.0 to before…
CVE-2026-51308.8
The Debugger & Troubleshooter plugin for WordPress was vulnerable to Unauthenticated…
CVE-2014-1251129.8
Plack::Middleware::Session::Cookie versions through 0.21 for Perl allows remote code…

Frequently asked

Is CVE-2026-53871 being actively exploited?

CVE-2026-53871 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.50%.

How severe is CVE-2026-53871?

CVE-2026-53871 has a CVSS 3.1 base score of 8.1, rated high. EPSS estimates a 0.50% probability of exploitation.

How do I fix CVE-2026-53871?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-53871 against the real software inventory on every managed device, as each hourly inventory arrives. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Get Patch this first every Monday

Five vulnerabilities that matter this week, ranked on real exploitation. Plain language, one email, no spam.

You can unsubscribe with one click from every issue. We handle your details as described in our privacy policy.

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.