# CVE-2026-61808: LightRAG: Missing Authentication for Critical API Functions in Default Configuration

> Unauthenticated attackers can read, modify, and delete data in LightRAG due to disabled authentication in the default configuration.

- **Severity:** Critical 9.8 (`CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H`)
- **Exploited in the wild:** Not known
- **Login needed:** Not needed
- **Attackable:** Over the internet
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 7 Aug 2026
- **Updated:** 10 Aug 2026
- **Also known as:** GHSA-mmg5-8x8q-v934

## What is CVE-2026-61808?

CVE-2026-61808 is a critical missing authorization vulnerability in HKUDS LightRAG, published on 7 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.

### Official description

LightRAG provides simple and fast retrieval-augmented generation. Through version 1.5.4, the LightRAG API server binds to all network interfaces with authentication disabled by default, allowing an unauthenticated network attacker to read indexed document content, upload or delete documents, modify the knowledge graph, cancel pipelines, clear caches, and consume LLM resources. This issue is mitigated in version 1.5.5rc1.

Weakness: CWE-306 (Missing Authentication for Critical Functionality)

## Which versions are affected by CVE-2026-61808?


## How do I fix CVE-2026-61808?

No fix has been published for CVE-2026-61808 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-61808 being exploited?

It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-61808 exists.

Public exploit code:

- LightRAG <= 1.5.4 - Missing Authentication (nuclei): http/cves/2026/CVE-2026-61808.yaml

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-61808 and fix it if it is affected.

What it is: CVE-2026-61808 is a critical missing authorization vulnerability in HKUDS LightRAG, published on 7 Aug 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-2026-61808 exists.

Affected product: HKUDS LightRAG. 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-2026-61808/ (Markdown: https://insights.sbomify.com/CVE-2026-61808/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-61808
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-61808
- OSV: https://osv.dev/vulnerability/CVE-2026-61808

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-61808/
Summaries are generated and may contain mistakes; the official description above is the record.