Vulnerability in lightrag-hku (CVE-2026-39413)
Summary
Vulnerability in lightrag-hku (CVE-2026-39413). Confidential information can be exposed externally. Exploitable via validate_token. Mitigation: upgrade to 1.4.14 or later.
Original description
The description as published by the source.
LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.4.14, the LightRAG API is vulnerable to a JWT algorithm confusion attack where an attacker can forge tokens by specifying 'alg': 'none' in the JWT header. Since the jwt.decode() call does not explicitly deny the 'none' algorithm, a crafted token without a signature will be accepted as valid, leading to unauthorized access. This vulnerability is fixed in 1.4.14.
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-39413 has been found in lightrag-hku.
Attackers can target a specific entry point like validate_token over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 4.2/10.
What to do: upgrade lightrag-hku to 1.4.14 or later.
If unsure, ask your IT team or search "lightrag-hku CVE-2026-39413" on the vendor's site.
CVE-2026-39413 (lightrag-hku) — CWE-347 / CVSS v3 4.2
Attack vector: remote (network-reachable)
Attack surface: validate_token
Patched: 1.4.14 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-347) exists in lightrag-hku. Attackers reach the vulnerable code path via validate_token.
Check the vendor advisory for the affected versions of lightrag-hku. Attack surface: validate_token.
Severity: Medium (CVSS 4.2/10). Confidential information can be exposed externally.
Update to 1.4.14.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'lightrag-hku' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'lightrag-hku' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
lightrag-hkuを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade lightrag-hku to 1.4.14ステージング環境で 1.4.14 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- report github.com
- web github.com
- web github.com