CVE-2026-56595Network attack vector

Unauthorized API actions via unvalidated Origin headers

Published Sep 18, 2026 · Updated Sep 18, 2026

CORS misconfiguration in HCL BigFix Service Management v27 allows remote attackers to submit unauthorized requests to restricted APIs. The application improperly validates Origin headers, allowing an attacker-controlled page to issue cross-origin requests that the browser treats as permitted. Exploitation requires victim interaction while the browser can reach the application, and the published impact is limited to unauthorized API actions.

CVSS severity3.1
Low
EPSS probability0.15%
Next 30 days · Oct 19, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Get started

Summary

What happened

CORS misconfiguration in HCL BigFix Service Management v27 allows remote attackers to submit unauthorized requests to restricted APIs. The application improperly validates Origin headers, allowing an attacker-controlled page to issue cross-origin requests that the browser treats as permitted. Exploitation requires victim interaction while the browser can reach the application, and the published impact is limited to unauthorized API actions.

The record

CVE
CVE-2026-56595
Published
Sep 18, 2026
Updated
Sep 18, 2026
Vendor
HCL Software
Product
HCL BigFix Service Management
Classifications
CWE-942, T1189
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Sep 18, 2026CVE publishedPublication date reported by the CVE source.
  2. Sep 18, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=v27

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

HCL Software · HCL BigFix Service Managementversion=v27

Published CVSS scores

3.1HCL SoftwareCVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:L/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Activity data is delayed. The latest report is Sep 28, 2026.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 22, 2026Sep 28, 2026
Latest reporting daySep 28, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-942Permissive Cross-domain Security Policy with Untrusted Domains
T1189Drive-by Compromise

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Get started to see how Hinoki identifies affected software and validates exploitability in your environment.

Get started