# CVE-2026-9420: KLiK SocialMediaWebsite HTTP GET Request Parameter injection

> Attackers can inject malicious content via HTTP GET parameters in KLiK SocialMediaWebsite, potentially compromising application integrity.

- **Severity:** Medium 5.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P`)
- **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:** 25 May 2026
- **Updated:** 26 May 2026
- **Also known as:** GHSA-p36m-2qm6-9pq8

## What is CVE-2026-9420?

CVE-2026-9420 is a medium-severity vulnerability in KLiK SocialMediaWebsite, published on 25 May 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

A vulnerability was found in KLiK SocialMediaWebsite 1.0. This affects an unknown part of the component HTTP GET Request Parameter Handler. The manipulation results in injection. It is possible to launch the attack remotely. The exploit has been made public and could be used.

Weakness: CWE-74 (Improper Neutralization of Special Elements in Output Used by a Downstream Component), CWE-707 (Improper Neutralization)

## Which versions are affected by CVE-2026-9420?


## How do I fix CVE-2026-9420?

No fix has been published for CVE-2026-9420 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-9420 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9420 exists.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-9420 and fix it if it is affected.

What it is: CVE-2026-9420 is a medium-severity vulnerability in KLiK SocialMediaWebsite, published on 25 May 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: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-9420 exists.

Affected product: KLiK SocialMediaWebsite. 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-2026-9420/ (Markdown: https://insights.sbomify.com/CVE-2026-9420/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-9420
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-9420
- OSV: https://osv.dev/vulnerability/CVE-2026-9420

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-9420/
Summaries are generated and may contain mistakes; the official description above is the record.