What is CVE-2026-61808?

CVE-2026-61808 is a critical-severity vulnerability in Hkuds Lightrag, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-08-07.

How severe is CVE-2026-61808?

Critical severity. CVSS v3 base score is 9.8 out of 10.

Auth bypass in Hkuds Lightrag

CVE-2026-61808

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.

Vulnerability class: Broken Authentication

EPSS: 0.020 (79.3th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 9.8 (Critical). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H.

Affected products

Hkuds Lightrag — versions < 1.5.5rc1

Weakness classification (CWE)

CWE-306 — Missing Authentication for Critical Function

References

security-advisories@github.com (x_refsource_MISC)
security-advisories@github.com (x_refsource_CONFIRM)

Frequently asked questions

What is CVE-2026-61808?: CVE-2026-61808 is a critical-severity vulnerability in Hkuds Lightrag, classified under Missing Authentication for Critical Function. CVSS score: 9.8/10. Published 2026-08-07.
How severe is CVE-2026-61808?: Critical severity. CVSS v3 base score is 9.8 out of 10.