# CVE-2026-8152: Unblu Spark Open Redirect leading to DOM-Based XSS

> Attackers can exploit an open redirect to trigger DOM-based XSS, potentially accessing host application data when embedded setup is enabled.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:N/SC:H/SI:H/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 22 Jul 2026
- **Updated:** 22 Jul 2026
- **Also known as:** GHSA-6f3h-gqrm-69gc

## What is CVE-2026-8152?

CVE-2026-8152 is a critical cross-site scripting vulnerability in Unblu Spark, published on 22 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.

### Official description

Unblu Spark contains an open redirect vulnerability that can be escalated to a DOM-based cross-site scripting (XSS) attack.

When Unblu Spark is deployed with com.unblu.identifier.siteEmbeddedSetup=true, it runs in the same origin as the host application. Any JavaScript injected through this vulnerability therefore executes with full access to the host application's cookies, DOM, and same-origin APIs — an attacker can reach all resources of the host application, not just Unblu's. This expanded blast radius is the reason on-premises deployments using this configuration are rated CRITICAL.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation), CWE-601 (URL Redirection to Untrusted Site)

## Which versions are affected by CVE-2026-8152?


## How do I fix CVE-2026-8152?

No fix has been published for CVE-2026-8152 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-8152 being exploited?

There is no known exploitation of CVE-2026-8152 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-8152 and fix it if it is affected.

What it is: CVE-2026-8152 is a critical cross-site scripting vulnerability in Unblu Spark, published on 22 Jul 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-8152 in the wild and no public exploit code.

Affected product: Unblu Spark. 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-2026-8152/ (Markdown: https://insights.sbomify.com/CVE-2026-8152/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-8152
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-8152
- OSV: https://osv.dev/vulnerability/CVE-2026-8152

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-8152/
Summaries are generated and may contain mistakes; the official description above is the record.