# CVE-2026-68583: luci-app-adblock-fast before 1.2.4-4 Stored XSS via file_url.name

> Lower-privileged users can inject HTML into blocklist names, executing scripts in administrators' browsers via the AdBlock Fast status page.

- **Severity:** Medium 5.1 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:P/VC:L/VI:L/VA:N/SC:L/SI:L/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 2 Aug 2026
- **Updated:** 14 Aug 2026
- **Also known as:** GHSA-vh6j-2jxw-848c

## What is CVE-2026-68583?

CVE-2026-68583 is a medium-severity cross-site scripting vulnerability in openwrt luci, published on 2 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

luci-app-adblock-fast before 1.2.4-4 contains a stored cross-site scripting vulnerability in the blocklist name field that allows lower-privileged users to inject active HTML. When an administrator views the AdBlock Fast status page, the injected payload executes in the administrator's browser under the LuCI origin.

Weakness: CWE-79 (Improper Neutralization of Input During Web Page Generation)

## Which versions are affected by CVE-2026-68583?


## How do I fix CVE-2026-68583?

No fix has been published for CVE-2026-68583 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-68583 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68583 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-68583 and fix it if it is affected.

What it is: CVE-2026-68583 is a medium-severity cross-site scripting vulnerability in openwrt luci, published on 2 Aug 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-68583 exists.

Affected product: openwrt luci. 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-2026-68583/ (Markdown: https://insights.sbomify.com/CVE-2026-68583/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-68583
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-68583
- OSV: https://osv.dev/vulnerability/CVE-2026-68583

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-68583/
Summaries are generated and may contain mistakes; the official description above is the record.