CVE-2026-56453 is a medium severity (CVSS 5.5) account takeover flaw in HCL DFXAnalytics. A remote attacker who can alter the server's HTTP responses can manipulate authentication or authorization logic in the client. HCL's security bulletin KB0131787 lists the remediation, so apply it.
What's affected
The record lists HCL DFXAnalytics and does not give version ranges. HCL's security bulletin, titled Multiple security vulnerabilities affect HCL DFXAnalytics, carries the affected versions and the fix. The page needs JavaScript to display, so I could not read the contents for this post.
The CVSS vector is AV:N/AC:H/PR:L/UI:R/S:C. The attacker needs to intercept and change traffic between the server and the client, which is why the complexity is high and the score is medium. The scope change reflects that the impact can reach beyond the vulnerable component.
How to check if you're exposed
HCL publishes the fixed version and affected range in its security bulletin, which needs a browser to read. Open the bulletin linked below and compare it with your installed version.
- Find your DFXAnalytics version in the product's about page or in your deployment records.
- Check whether users reach the service over HTTPS only, with valid certificates.
- Ask whoever manages the product for the bulletin's fixed version and the date it was applied.
What to do now
- Open HCL bulletin KB0131787 and note the fixed version for your release.
- Apply the update, or the fix HCL specifies, in a test environment and then in production.
- Require HTTPS with current TLS settings for every connection to DFXAnalytics.
- Check that authorization decisions are enforced on the server and not only in the client, if you build integrations on top of it.
- Review account activity for unexpected logins or privilege changes.
Why it matters
The record lists CWE-294, authentication bypass by capture-replay. The description fits a client that makes access decisions from what a response says. If the response can be changed on the way, the decision can be changed with it.
The lasting fix is for the server to enforce authentication and authorization on every request, whatever the client displays. Transport encryption raises the cost of tampering, but it does not replace server side checks. The record is not in CISA's Known Exploited Vulnerabilities catalog.
Quick check
Why is this only medium severity?
The attacker has to be able to intercept and alter traffic, and a user must take part. That raises complexity, though the effect is account takeover.
Sources
Last reviewed: 19 October 2026.
