# CVE-2026-34229: Emlog: Stored XSS in Comment Module via URI Scheme Validation Bypass

> Attackers can inject malicious scripts into comments via URI scheme bypass, potentially stealing user sessions or executing code in Emlog CMS.

- **Severity:** Medium 6.1 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A: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:** 3 Apr 2026
- **Updated:** 6 Apr 2026
- **Also known as:** GHSA-74gp-xh6w-hqw6

## What is CVE-2026-34229?

CVE-2026-34229 is a medium-severity cross-site scripting vulnerability in Emlog Emlog, published on 3 Apr 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

Emlog is an open source website building system. Prior to version 2.6.8, there is a stored cross-site scripting (XSS) vulnerability in emlog comment module via URI scheme validation bypass. This issue has been patched in version 2.6.8.

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

## Which versions are affected by CVE-2026-34229?

It affects 1 product.


Products: Emlog Emlog.

## How do I fix CVE-2026-34229?

No fix has been published for CVE-2026-34229 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34229 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34229 exists.

## Other vulnerabilities in Emlog Emlog

- [CVE-2025-29401](https://insights.sbomify.com/CVE-2025-29401/): File upload in n/a (critical 9.8)
- [CVE-2025-25783](https://insights.sbomify.com/CVE-2025-25783/): File upload in n/a (critical 9.8)
- [CVE-2023-44973](https://insights.sbomify.com/CVE-2023-44973/): File upload in n/a (critical 9.8)
- [CVE-2023-44974](https://insights.sbomify.com/CVE-2023-44974/): File upload in n/a (critical 9.8)
- [CVE-2023-43291](https://insights.sbomify.com/CVE-2023-43291/): Deserialization in n/a (critical 9.8)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34229 and fix it if it is affected.

What it is: CVE-2026-34229 is a medium-severity cross-site scripting vulnerability in Emlog Emlog, published on 3 Apr 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-2026-34229 exists.

Affected product: Emlog Emlog. 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-2026-34229/ (Markdown: https://insights.sbomify.com/CVE-2026-34229/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34229
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34229
- OSV: https://osv.dev/vulnerability/CVE-2026-34229

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34229/
Summaries are generated and may contain mistakes; the official description above is the record.