CVE-2026-61736

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

This critical-severity CVE scores 9.3 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 1.4%, top 28% of all CVEs by exploit prediction. GitHub Security Advisory data not yet ingested — confidence will rise once GHSA publishes (typical lag: hours to days for open-source ecosystem CVEs; never for infrastructure-only CVEs).

Triggered by: NVD CVSS baseline
Sources: epss, secondary
Elevated
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.3Exploit: Elevated riskExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, the server defaults to CORS_ORIGINS=* combined with allow_credentials=True in lightrag/api/lightrag_server.py, causing Starlette CORSMiddleware to effectively whitelist every origin for credentialed cross-origin requests. Any malicious website visited by an authenticated LightRAG user can silently make authenticated API requests, exfiltrating documents and knowledge graph data or performing destructive actions such as deleting the document store. This vulnerability is fixed in 1.5.4.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
58(Track)
EG Risk 58/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation40% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
72%
KEV
Not listed

Published

July 15, 2026

Last Modified

July 15, 2026

Advisory Details (6)

Auto-updated Sep 15, 2026
🔬 Proof of concept available. Patch available. Sources: github_pr, github_release, github, github_commit.
github Patch Available🟡 PoC Available

CORS Wildcard + Credentials Enables Any-Origin Credentialed Requests · Advisory · HKUDS/LightRAG · GitHub

https://github.com/HKUDS/LightRAG/security/advisories/GHSA-6x6h-qqr7-855w
github_release Patch Available

v1.5.4

Patch available: HKUDS/LightRAG v1.5.4

https://github.com/HKUDS/LightRAG/releases/tag/v1.5.4
github_pr Patch Available

fix(api): don't pair wildcard CORS origin with credentials

Patch available: HKUDS/LightRAG v1.5.4 (PR #3317 merged 2026-06-24)

https://github.com/HKUDS/LightRAG/pull/3317
github_commit Patch Available

commit ebba6548639c (HKUDS/LightRAG)

Patch available: HKUDS/LightRAG v1.5.4 (contains commit ebba6548639c)

https://github.com/HKUDS/LightRAG/commit/ebba6548639c0f2e8919100eff76b401f1222252
github_commit Patch Available

commit df68d75f9dc2 (HKUDS/LightRAG)

Patch available: HKUDS/LightRAG v1.5.4 (contains commit df68d75f9dc2)

https://github.com/HKUDS/LightRAG/commit/df68d75f9dc29dd340ffb6794b48f48c4fdc9a2d
github_commit Patch Available

commit 09567a4c983f (HKUDS/LightRAG)

Patch available: HKUDS/LightRAG v1.5.4 (contains commit 09567a4c983f)

https://github.com/HKUDS/LightRAG/commit/09567a4c983f580050db63569dd477122c058c3d

Vendor Advisories for CVE-2026-61736(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
lightrag-hku0.0.2 ... 1.5.3 (87 versions)1.5.4—

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 6× in last 7d / 38× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

Showing the most recent 100 of 105 total refreshes for this CVE.

  1. 2026-09-18 19:28 UTCEPSS rescore
  2. 2026-09-18 04:46 UTCEG score recompute
  3. 2026-09-16 14:08 UTCEPSS rescore
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  1. 2026-08-27 14:25 UTCEPSS rescore
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  5. 2026-08-25 13:49 UTCEPSS rescore
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  45. 2026-08-04 10:39 UTCEPSS rescore
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  53. 2026-07-30 16:28 UTCEPSS rescore
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  56. 2026-07-28 15:37 UTCEPSS rescore
  57. 2026-07-27 17:23 UTCEG score recompute
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  70. 2026-07-22 14:08 UTCEPSS rescore
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  75. 2026-07-19 14:31 UTCEPSS rescore

Publicly available exploits

(1 reference)

Working exploit code is in the public domain. Defenders should treat patch urgency accordingly — public PoCs typically lead to mass-exploitation within 24-72 hours.

  • Nucleihttp/cves/2026/CVE-2026-61736.yaml
    First seen Jan 1, 2026

    LightRAG <= 1.5.3 - Credentialed CORS Wildcard

    Open source ↗

Frequently asked(5)

What is CVE-2026-61736?
CVE-2026-61736 is a critical vulnerability published on July 15, 2026. LightRAG provides simple and fast retrieval-augmented generation. Prior to 1.5.4, the server defaults to CORSORIGINS=* combined with allowcredentials=True in lightrag/api/lightrag_server.py, causing Starlette CORSMiddleware to effectively whitelist every origin for credentialed cross-origin…
When was CVE-2026-61736 disclosed?
CVE-2026-61736 was first published in the National Vulnerability Database on July 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-61736 actively exploited?
CVE-2026-61736 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 28.3% of all scored CVEs.
What is the CVSS score of CVE-2026-61736?
CVE-2026-61736 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-61736?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-61736, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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