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Advisory record · GHSA-xpjq-3w4w-w5wr

lightrag-hku: Stored Cross-Site Scripting (XSS) in the LightRAG WebUI chat/answer renderer via ingested content

CVSS 6.1 MediumEPSS 0.0034 · 27th percentile

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.

PackageEcosystemAffectedFixed in
lightrag-hkuPyPI<1.5.51.5.5
Identifiers
GHSA-xpjq-3w4w-w5wr · CVE-2026-86062 · PYSEC-2026-4065
Weakness (CWE)
CWE-79
Tags
Published
22 Sept 2026
Updated
1 Oct 2026

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Stored cross-site scripting in the lightrag-hku package affects versions before 1.5.5. The LightRAG WebUI renders chat answers as raw HTML, so an attacker who can add a document can store a script that runs in the browser of a user who later retrieves that answer, such as an administrator, and may steal authentication tokens. Upgrade to lightrag-hku 1.5.5 or later. The source gives no other workaround.

Written 1 Nov 2026.

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

ScoreRatingCVSSVectorSource
6.1 Medium 3.1 CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N CNA (GitHub_M)
  • CISA KEV Not listed.
  • EPSS 0.0034, the 27th percentile, on 14 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

  1. 31 Oct 2026, 14:09 UTC First seen by agentprime
  2. 31 Oct 2026, 14:09 UTC Confirmed by OSV

Sources

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.