# lightrag-hku: SSRF via IPv6-transition address bypass (NAT64, IPv4-compatible, 6to4) of the native-markdown image-download guard

Advisory record · `GHSA-vv3m-f8x4-7377`

- **Identifiers:** `GHSA-vv3m-f8x4-7377` · `CVE-2026-85740` · `PYSEC-2026-4064`
- **State:** Confirmed
- **Severity:** CVSS 7.1 High
- **Critical:** No
- **Weakness (CWE):** [CWE-918](https://cwe.mitre.org/data/definitions/918.html)
- **Tags:** [Server-side request forgery (SSRF)](https://agentprime.io/advisories/tag/ssrf.md)
- **Published:** 22 Sept 2026
- **Updated:** 1 Oct 2026
- **Reviewed by a person:** No

Published by the GitHub Advisory Database at 22 Sept 2026, 20:40 UTC. agentprime has not analysed this yet, so whether it affects any app is not known.

## Affected packages

- `lightrag-hku` (PyPI): affected `<1.5.5`; fixed in `1.5.5`

## Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

## Severity and exploitation

- 7.1 High, CVSS 3.1: `CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:C/C:H/I:L/A:N`, from CNA (GitHub_M)

- **CISA KEV:** Not listed.
- **EPSS:** 0.0026, the 18th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

## Timeline

- 31 Oct 2026, 14:09 UTC: First seen by agentprime
- 31 Oct 2026, 14:09 UTC: [Confirmed by OSV](https://osv.dev/vulnerability/GHSA-vv3m-f8x4-7377)

## Sources

- [GitHub Advisory Database: GHSA-vv3m-f8x4-7377](https://github.com/advisories/GHSA-vv3m-f8x4-7377)
- [OSV: GHSA-vv3m-f8x4-7377](https://osv.dev/vulnerability/GHSA-vv3m-f8x4-7377)
- <https://github.com/HKUDS/LightRAG/security/advisories/GHSA-vv3m-f8x4-7377>
- <https://nvd.nist.gov/vuln/detail/CVE-2026-85740>
- <https://github.com/HKUDS/LightRAG/pull/3426>
- <https://github.com/HKUDS/LightRAG/commit/9207e7fd10cf6df3cf26e3dd1921490b34a2f132>
- <https://github.com/HKUDS/LightRAG/commit/a25862177a9b00e0edb870778a42b4155924de09>
- <https://github.com/HKUDS/LightRAG/commit/c598545aa0084a427bcb19a84ade5e0ec31fa673>
- <https://github.com/HKUDS/LightRAG>
- <https://github.com/HKUDS/LightRAG/releases/tag/v1.5.5>

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.

## Check whether this affects you

A Match means an installed version is in the affected range above. Most don’t affect the app; agentprime hasn’t analysed this one yet.

- With the agentprime MCP server (<https://api.agentprime.io/mcp>), ask your agent to check the project: `check_lockfile` sends a lockfile, `check_packages` a list of installed packages, and both return the Matches and the upgrades that clear them. `get_advisory` returns this record. Setup: <https://agentprime.io/mcp.md>
- In a browser: <https://agentprime.io/check/> reads your lockfile in the browser, never uploading it.
- Whether it touches your code, with file and line: the Claude Code plugin, <https://agentprime.io/plugin.md>
- As JSON: <https://api.agentprime.io/v1/advisories/GHSA-vv3m-f8x4-7377>, or `POST https://api.agentprime.io/v1/match` with your packages (<https://agentprime.io/api.md>)

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The web page: <https://agentprime.io/advisories/GHSA-vv3m-f8x4-7377/>. Everything for agents: <https://agentprime.io/llms.txt>.