# CVE-2026-56455: HCL DFXAnalytics is affected by a Buffer Overflow vulnerability that can lead to a Denial of Service (DoS).

> An attacker can cause a denial of service in HCL DFXAnalytics by exploiting a buffer overflow via excessive input, requiring input validation fixes.

- **Severity:** Medium 5.3 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Jul 2026
- **Updated:** 16 Jul 2026
- **Also known as:** GHSA-c4fr-5qh5-c6fh

## What is CVE-2026-56455?

CVE-2026-56455 is a medium-severity memory corruption vulnerability in HCL Software DFXAnalytics, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

HCL DFXAnalytics is affected by a Buffer Overflow vulnerability that can lead to a Denial of Service (DoS). The application fails to properly validate input sizes, allowing an attacker to pass an excessive amount of information into a memory container, which can cause the system to crash or become unresponsive. To mitigate this flaw, comprehensive input length checks must be implemented and enforced on both the client and server sides.

Weakness: CWE-121 (Stack-based Buffer Overflow)

## Which versions are affected by CVE-2026-56455?

It affects 1 product.


Products: Hcltech Dfxanalytics.

## How do I fix CVE-2026-56455?

No fix has been published for CVE-2026-56455 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56455 being exploited?

There is no known exploitation of CVE-2026-56455 in the wild and no public exploit code.

## Other vulnerabilities in HCL Software DFXAnalytics

- [CVE-2026-56454](https://insights.sbomify.com/CVE-2026-56454/): HCL DFXAnalytics is affected by a Deprecated Protocol vulnerability due to the use of TLS 1.0 and TLS 1.1. (medium 5.9)
- [CVE-2026-56453](https://insights.sbomify.com/CVE-2026-56453/): HCL DFXAnalytics is affected by an Account Takeover via Response Manipulation vulnerability. (medium 5.5)
- [CVE-2026-56456](https://insights.sbomify.com/CVE-2026-56456/): HCL DFXAnalytics is affected by an Internal File Path Disclosure vulnerability. (medium 5.3)
- [CVE-2025-31970](https://insights.sbomify.com/CVE-2025-31970/): HCL DFXAnalytics is affected by an Insecure Security Header configuration vulnerability (medium 5.3)
- [CVE-2025-59851](https://insights.sbomify.com/CVE-2025-59851/): HCL DFXAnalytics is affected by an Insecure Security Header configuration vulnerability (low 3.7)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56455 and fix it if it is affected.

What it is: CVE-2026-56455 is a medium-severity memory corruption vulnerability in HCL Software DFXAnalytics, published on 16 Jul 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-56455 in the wild and no public exploit code.

Affected product: HCL Software DFXAnalytics. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-56455/ (Markdown: https://insights.sbomify.com/CVE-2026-56455/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56455
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56455
- OSV: https://osv.dev/vulnerability/CVE-2026-56455

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-56455/
Summaries are generated and may contain mistakes; the official description above is the record.