# CVE-2026-4276: LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.

> Attackers can forge log entries in LibreChat RAG API via log injection, compromising audit trails and potentially misleading security monitoring.

- **Severity:** High 7.5 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 16 Mar 2026
- **Updated:** 17 Mar 2026
- **Also known as:** GHSA-hx3h-9mjj-5pmg

## What is CVE-2026-4276?

CVE-2026-4276 is a high-severity code injection vulnerability in Librechat Librechat, published on 16 Mar 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

LibreChat RAG API, version 0.7.0, contains a log-injection vulnerability that allows attackers to forge log entries.

Weakness: CWE-94 (Improper Control of Generation of Code)

## Which versions are affected by CVE-2026-4276?

It affects 1 product.


Products: Librechat Librechat.

## How do I fix CVE-2026-4276?

No fix has been published for CVE-2026-4276 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-4276 being exploited?

There is no known exploitation of CVE-2026-4276 in the wild and no public exploit code.

## Other vulnerabilities in Librechat Librechat

- [CVE-2026-32625](https://insights.sbomify.com/CVE-2026-32625/): LibreChat Exfiltrates Server Secrets via MCP Server URL Injection (critical 9.6)
- [CVE-2024-11167](https://insights.sbomify.com/CVE-2024-11167/): Improper Access Control in danny-avila/librechat (critical 9.4)
- [CVE-2026-22252](https://insights.sbomify.com/CVE-2026-22252/): LibreChat MCP Stdio Remote Command Execution (critical 9.1)
- [CVE-2025-69222](https://insights.sbomify.com/CVE-2025-69222/): LibreChat is vulnerable to Server-Side Request Forgery due to missing restrictions (critical 9.1)
- [CVE-2024-41704](https://insights.sbomify.com/CVE-2024-41704/): Path traversal in n/a (critical 9.1)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-4276 and fix it if it is affected.

What it is: CVE-2026-4276 is a high-severity code injection vulnerability in Librechat Librechat, published on 16 Mar 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-2026-4276 in the wild and no public exploit code.

Affected product: Librechat Librechat. 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-2026-4276/ (Markdown: https://insights.sbomify.com/CVE-2026-4276/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-4276
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-4276
- OSV: https://osv.dev/vulnerability/CVE-2026-4276

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-4276/
Summaries are generated and may contain mistakes; the official description above is the record.