CVE-2026-61808

CRITICALPre-NVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to the CVSS score beside it.

This critical-severity CVE scores 9.8 under a secondary CVSS source (NVD's own analysis pending). EPSS exploit probability: 2.5% (84th percentile of EPSS-scored CVEs). No GitHub Security Advisory CVSS is on record for this CVE.

Triggered by: Headline CVSS from a secondary CVSS source
Sources: EPSS, a secondary CVSS source
Elevated

Also known asEUVD-2026-54644 (ENISA EUVD)Source: ENISA EUVD

9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines at low or medium mission impact and sooner than that at high (the SSVC decision on this page).
  • CISA's Vulnrichment rates exploitation as PoC; EchelonGraph holds no exploit-code reference for it
CISA-KEV: Not listedEPSS PROB: 2.5%CVSS: 9.8Exploit: No code on recordExposed services: Not assessed

A fix is available — apply it.

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.

CVSS v3
9.8
EG Score
9.8CRITICALmedium confidence
EG Risk
75
EG Risk 75/100

EG Risk is EchelonGraph's 0–100 priority score. It fuses impact severity (EG Severity, the CVSS base score, never the KEV-floored or EPSS-lifted EG Score) with real-world exploitation and automatability, under weights EchelonGraph set by hand, so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner.

How it’s computed (value × EchelonGraph’s weight)
Severity98% × 45%
Impact severity (EG Severity): CVSS 9.8 of 10. Never the KEV-floored or EPSS-lifted EG Score.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability100% × 15%
CISA's SSVC Automatable value: yes (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low, Track* at medium and Attend at high mission impact.
Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.
EPSS PROB
2.5%
EPSS %ILE
84th
KEV
Not listed

What the EG score is made of (scorer v4.0: the three questions the 0–10 score mixes, published apart · methodology)

The EG score (9.8): severity, escalated by confirmed exploitation. This CVE's 9.8 is its impact severity (EG Severity), not escalated.

EG Severity
9.8 CRITICALCVSS-B, impact only: no KEV listing, EPSS or EG-KEV tier raises it.a secondary CVSS source · CVSS v3.0 or v3.1
EG Likelihood
2.5% within 30 daysSource: FIRST EPSS (model v2026.06.15, score date 2026-10-29). FIRST's exploitation probability, not an EchelonGraph model.
Confirmed exploitation
None on record (CISA KEV, EG-KEV Tier 1)Reported apart from the likelihood: an observed fact, not a probability.
EG Priority
SSVC Track* at medium mission impactTrack at low, Track* at medium and Attend at high mission impact.CISA BOD 26-04: 3 days if the affected system is publicly exposed; 60 days if it is not.Each input and its source: the SSVC and BOD 26-04 blocks below.

SSVC (CISA's decision table, applied by EchelonGraph)Track at low, Track* at medium and Attend at high mission impact.

A fix is available. Apply it within your standard update timelines at low or medium mission impact and sooner than that at high.

Exploitation public PoC (CISA Vulnrichment) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)3 days if the affected system is publicly exposed; 60 days if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable yes (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

August 7, 2026

Last Modified

October 24, 2026

Advisory Details (2)

Auto-updated Oct 26, 2026
🔬 Proof of concept available. Patch available. Sources: github_commit, github.
GitHub advisoryMentions a patch (unverified)🟡 PoC Available

Missing Authentication for Critical API Functions in Default Configuration · Advisory · HKUDS/LightRAG · GitHub

https://github.com/HKUDS/LightRAG/security/advisories/GHSA-mmg5-8x8q-v934
GitHub commit Patch Available

commit 0bd102401b4b (HKUDS/LightRAG)

Patch available: HKUDS/LightRAG v1.5.5rc1 (contains commit 0bd102401b4b)

https://github.com/HKUDS/LightRAG/commit/0bd102401b4b28a02664e5b6af476bf7a4470292

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 14× in last 7d / 57× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 145 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 45 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-29 21:56 UTCEG score recompute
  2. 2026-10-29 16:33 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  3. 2026-10-28 21:17 UTCEG score recompute
  4. 2026-10-28 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  6. 2026-10-27 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  7. 2026-10-26 19:56 UTCEG score recompute
  8. 2026-10-26 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  10. 2026-10-25 16:33 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  14. 2026-10-23 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  20. 2026-10-20 16:33 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  22. 2026-10-19 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  24. 2026-10-18 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  25. 2026-10-18 03:25 UTCEG score recompute
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  1. 2026-10-17 19:09 UTCEG score recompute
  2. 2026-10-17 16:35 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  3. 2026-10-16 18:27 UTCEG score recompute
  4. 2026-10-16 16:43 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  5. 2026-10-15 16:32 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  6. 2026-10-15 15:00 UTCEG score recompute
  7. 2026-10-14 16:33 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  8. 2026-10-14 09:28 UTCEG score recompute
  9. 2026-10-13 16:34 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  10. 2026-10-13 07:01 UTCEG score recompute
  11. 2026-10-12 16:34 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  16. 2026-10-11 13:49 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  17. 2026-10-10 20:00 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  18. 2026-10-09 20:07 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  19. 2026-10-08 17:13 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  20. 2026-10-07 23:48 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  21. 2026-10-06 23:16 UTCEG score recompute
  22. 2026-10-06 15:18 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  23. 2026-10-05 18:32 UTCEG score recompute
  24. 2026-10-05 17:43 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  26. 2026-10-03 14:26 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  27. 2026-10-03 00:59 UTCEG score recompute
  28. 2026-10-02 17:56 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  29. 2026-10-02 09:31 UTCEG score recompute
  30. 2026-10-01 19:50 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  32. 2026-09-30 15:03 UTCEPSS rescoreEPSS 2.5% · 84th percentile
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  34. 2026-09-28 13:51 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  35. 2026-09-27 17:07 UTCEG score recompute
  36. 2026-09-26 15:59 UTCEPSS rescoreEPSS 2.5% · 84th percentile
  37. 2026-09-25 04:13 UTCEG score recompute
  38. 2026-09-23 21:15 UTCEG score recompute
  39. 2026-09-23 17:54 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  40. 2026-09-22 21:19 UTCEG score recompute
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  44. 2026-09-18 19:28 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  45. 2026-09-18 00:55 UTCEG score recompute
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  47. 2026-09-16 14:08 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  48. 2026-09-16 06:50 UTCEG score recompute
  49. 2026-09-16 05:15 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  50. 2026-09-15 06:34 UTCEG score recompute
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  54. 2026-09-11 14:53 UTCEPSS rescoreEPSS 2.0% · 79th percentile
  55. 2026-09-11 09:51 UTCEG score recompute
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  57. 2026-09-10 12:40 UTCEG score recompute
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  59. 2026-09-08 22:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
  60. 2026-09-07 17:42 UTCEG score recompute
  61. 2026-09-07 16:01 UTCEPSS rescoreEPSS 1.4% · 70th percentile
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  75. 2026-08-30 19:17 UTCEPSS rescoreEPSS 1.4% · 70th percentile

Public detection templates

(1 reference)

A public Nuclei detection template is referenced for this CVE. A detection template checks whether a system is affected; it is not necessarily exploit code.

  • Nucleihttp/cves/2026/CVE-2026-61808.yaml
    Published Aug 14, 2026

    LightRAG <= 1.5.4 - Missing Authentication

    Open source ↗

Frequently asked(5)

What is CVE-2026-61808?
CVE-2026-61808 is a critical-severity vulnerability; its CVE record was published on August 7, 2026. 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…
When was the CVE record for CVE-2026-61808 published?
The CVE record for CVE-2026-61808 was published on August 7, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of October 24, 2026; the record at its source may have been updated since.
Is CVE-2026-61808 actively exploited?
CVE-2026-61808 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 2.5% probability of exploitation in the next 30 days (84th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-61808?
CVE-2026-61808 has a CVSS base score of 9.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-61808?
A fix for CVE-2026-61808 is available: update to the fixed version the vendor names in its advisory.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-61808

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