# CVE-2026-34415: Xerte Online Toolkits File Upload RCE via elfinder Connector

> Unauthenticated attackers can upload malicious PHP files via elFinder connector to execute arbitrary commands on the server.

- **Severity:** Critical 9.3 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 22 Apr 2026
- **Updated:** 14 Jul 2026
- **Also known as:** GHSA-67j3-r63p-59hf

## What is CVE-2026-34415?

CVE-2026-34415 is a critical vulnerability in thexerteproject xerteonlinetoolkits, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

Xerte Online Toolkits versions 3.15 and earlier contain an incomplete input validation vulnerability in the elFinder connector endpoint that fails to block PHP-executable extensions .php4 due to an incorrect regex pattern. Unauthenticated attackers can exploit this flaw combined with authentication bypass and path traversal vulnerabilities to upload malicious PHP code, rename it with a .php4 extension, and execute arbitrary operating system commands on the server.

Weakness: CWE-184 (Incomplete List of Disallowed Inputs)

## Which versions are affected by CVE-2026-34415?


## How do I fix CVE-2026-34415?

No fix has been published for CVE-2026-34415 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-34415 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34415 exists.

Public exploit code:

- Xerte Online Toolkits Arbitrary File Upload - Unauthenticated Media Upload (metasploit)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-34415 and fix it if it is affected.

What it is: CVE-2026-34415 is a critical vulnerability in thexerteproject xerteonlinetoolkits, published on 22 Apr 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-34415 exists.

Affected product: thexerteproject xerteonlinetoolkits. 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-2026-34415/ (Markdown: https://insights.sbomify.com/CVE-2026-34415/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-34415
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-34415
- OSV: https://osv.dev/vulnerability/CVE-2026-34415

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-34415/
Summaries are generated and may contain mistakes; the official description above is the record.