# CVE-2026-90603: Anil-matcha Open-Generative-AI S3 Upload upload-binary unrestricted upload

> Remote attackers can upload arbitrary files via the S3 upload endpoint, potentially leading to code execution or data modification.

- **Severity:** Medium 6.9 (`CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:X`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 13 Sep 2026
- **Updated:** 16 Sep 2026
- **Also known as:** GHSA-xxxm-jwv4-xmv7

## What is CVE-2026-90603?

CVE-2026-90603 is a medium-severity vulnerability in Anil-matcha Open-Generative-AI, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

A vulnerability was identified in Anil-matcha Open-Generative-AI up to 1.0.11/2.0.0. Affected by this issue is some unknown functionality of the file /api/upload-binary of the component S3 Upload. Such manipulation of the argument x-proxy-target-url leads to unrestricted upload. The attack may be launched remotely. The name of the patch is f013270957f75e439eaf97eb2a93decb32a4543e. Applying a patch is advised to resolve this issue.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type), CWE-284 (Improper Access Control)

## Which versions are affected by CVE-2026-90603?


## How do I fix CVE-2026-90603?

No fix has been published for CVE-2026-90603 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-90603 being exploited?

There is no known exploitation of CVE-2026-90603 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-90603 and fix it if it is affected.

What it is: CVE-2026-90603 is a medium-severity vulnerability in Anil-matcha Open-Generative-AI, published on 13 Sep 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-90603 in the wild and no public exploit code.

Affected product: Anil-matcha Open-Generative-AI. 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-2026-90603/ (Markdown: https://insights.sbomify.com/CVE-2026-90603/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-90603
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-90603
- OSV: https://osv.dev/vulnerability/CVE-2026-90603

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-90603/
Summaries are generated and may contain mistakes; the official description above is the record.