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Fencer Vulns
medium 5.9

CVE-2025-8415 json

Cryostat: authentication bypass if network policies are disabled

published 2025-08-20 14 mo ago modified 2026-06-17 4 mo ago also EUVD-2025-25390

cvss
5.9
version 3.1, CNA
cisa kev
Not listed
not in CISA's catalog
epss
0.3%
EPSS 0.3% chance of exploitation in 30 days, percentile 26%
public exploits
0
none known

Summary

A vulnerability was found in the Cryostat HTTP API. Cryostat's HTTP API binds to all network interfaces, allowing possible external visibility and access to the API port if Network Policies are disabled, allowing an unauthenticated, malicious attacker to jeopardize the environment.

Patch / fix

  • Cryostat Cryostat 4.0.2
  • Red Hat Cryostat 4 on RHEL 9 0.5.2-3, 4.0.2-3

Vendor advisories

What the vendors themselves say about their products: affected, fixed or not affected, and what to do.

red hat product security vex CVE-2025-8415 updated cvss 5.9

cryostat: authentication bypass if Network Policies are disabled

  • Red Hat Cryostat 4 cryostat, cryostat/cryostat-rhel9, cryostat/cryostat-rhel9-operator
    affected: workaround, no fix available
  • Red Hat Cryostat 4 on RHEL 9 cryostat/cryostat-rhel9 4.0.2-3, cryostat/cryostat-db-rhel9 4.0.2-3, cryostat/jfr-datasource-rhel9 4.0.2-3, cryostat/cryostat-reports-rhel9 4.0.2-3, cryostat/cryostat-storage-rhel9 4.0.2-3, cryostat/cryostat-rhel9-operator 4.0.2-3, +5 more
    fixed: vendor fix RHSA-2025:14919

Red Hat CSAF VEX © Red Hat, Inc., from https://security.access.redhat.com/data/csaf/v2/vex/; changed: reduced to product statuses and remediations. CC BY 4.0 · csaf

CISA SSVC

Exploitation
none
Automatable
no
Technical impact
total
Assessed
14 mo ago

Exploit prediction

0.33% chance of exploitation in the next 30 days, higher than 26% of all scored CVEs (FIRST EPSS, 2026-11-08).

CVSS scores

assigned by version score vector
CNA 3.1 5.9 CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:N

Affected products

  • Cryostat Cryostat
  • Red Hat Cryostat 4 on RHEL 9
  • Red Hat Cryostat 4

Classification

Weakness
  • CWE-289 Authentication Bypass by Alternate Name

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.