CVE-2026-8786

MEDIUMNVD 6.36.3
EchelonGraph scoreMEDIUM confidence

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

Score 6.3 from GitHub Security Advisory (severity: LOW) published 2026-05-18. NVD baseline CVSS 6.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: EPSS, GitHub Security Advisory, NVD CVSS v3
Elevated
6.3EG
EchelonGraph verdictPlan mitigationRemediate within your standard update timelines (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: 0.4%CVSS: 6.3Exploit: No code on recordExposed services: Not assessed

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

The CVE record's description, written by its CNA (VulDB), states the affected versions: "A vulnerability has been found in Tencent WeKnora up to 0.3.6." No release containing a fix is confirmed on record.

A vulnerability has been found in Tencent WeKnora up to 0.3.6. Affected by this issue is the function getKnowledgeBaseForInitialization of the file internal/handler/initialization.go of the component Config API Endpoint. The manipulation of the argument kbId leads to authorization bypass. It is possible to initiate the attack remotely. The exploit has been disclosed to the public and may be used. The vendor was contacted early about this disclosure but did not respond in any way.

CVSS v3
6.3
EG Score
6.3MEDIUMmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity63% × 45%
The EG Score, 6.3 of 10.
Exploitation40% × 40%
EchelonGraph's fixed weight for EG-KEV Tier 3 (Elevated): a constant, not a probability.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at low or medium mission impact; Track* at high (mission-essential systems).
Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation public PoC (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (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)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (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

May 18, 2026

Last Modified

May 19, 2026

Advisory Details (1)

Auto-updated May 18, 2026
No fix on record yet.
Web page

Insecure Direct Object Reference (IDOR) Allows Unauthorized Read and Modification of Knowledge Base Configurations · GitHub

https://gist.github.com/YLChen-007/1cdc50418f29af7ae671466425e52c7b

Vendor Advisories for CVE-2026-8786(1)

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

Weakness Classification(2)

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

Data Freshness Timeline

(refreshed 11× in last 7d / 29× 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 96 of 200 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. 4 repeat rows among the latest 100 are merged into the row they repeat. The 104 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-12 14:49 UTCEG score recompute
  2. 2026-10-11 19:16 UTCEG score recompute
  3. 2026-10-11 16:33 UTCEG score recompute
  4. 2026-10-11 13:50 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  5. 2026-10-11 13:49 UTCEG score recompute
  6. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  7. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  8. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  9. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  10. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  11. 2026-10-05 17:44 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  12. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 34th percentile
  13. 2026-10-01 19:51 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  14. 2026-09-30 15:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  15. 2026-09-30 03:40 UTCOSV refresh
  16. 2026-09-28 13:52 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  17. 2026-09-27 13:49 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  18. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  19. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 33rd percentile
  20. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  21. 2026-09-22 16:01 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  22. 2026-09-21 21:09 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  25. 2026-09-17 19:32 UTCEPSS rescoreEPSS 0.3% · 19th percentile
Show 71 more
  1. 2026-09-16 14:09 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  2. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  3. 2026-09-15 03:12 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  4. 2026-09-13 16:48 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  5. 2026-09-12 15:02 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  6. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  7. 2026-09-11 09:38 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  8. 2026-09-11 06:23 UTCOSV refresh
  9. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  10. 2026-09-06 13:48 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  11. 2026-09-05 15:31 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  12. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  13. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  14. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  15. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  16. 2026-08-30 19:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  17. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  18. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  19. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  20. 2026-08-26 14:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  21. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  22. 2026-08-24 14:18 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  23. 2026-08-23 17:17 UTCEG score recompute
  24. 2026-08-23 17:17 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  25. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  26. 2026-08-22 00:40 UTCEG score recompute
  27. 2026-08-22 00:40 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  28. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  29. 2026-08-20 22:56 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  30. 2026-08-20 19:12 UTCEG score recompute
  31. 2026-08-20 19:12 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  32. 2026-08-19 17:04 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  33. 2026-08-18 13:49 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  34. 2026-08-17 13:47 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  35. 2026-08-17 10:09 UTCEG score recompute
  36. 2026-08-17 10:08 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  37. 2026-08-16 14:56 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  38. 2026-08-16 03:41 UTCEG score recompute
  39. 2026-08-16 03:41 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  40. 2026-08-16 02:15 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  41. 2026-08-15 01:31 UTCEPSS rescoreEPSS 0.3% · 19th percentile
  42. 2026-08-14 02:14 UTCEG score recompute
  43. 2026-08-14 02:14 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  44. 2026-08-13 22:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  45. 2026-08-12 14:41 UTCEG score recompute
  46. 2026-08-12 14:41 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  47. 2026-08-12 13:51 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  48. 2026-08-11 13:43 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  49. 2026-08-11 04:23 UTCEG score recompute
  50. 2026-08-11 04:23 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  51. 2026-08-11 00:00 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  52. 2026-08-10 03:36 UTCEG score recompute
  53. 2026-08-10 03:36 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  54. 2026-08-09 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  55. 2026-08-09 02:49 UTCEG score recompute
  56. 2026-08-09 02:49 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  57. 2026-08-08 16:37 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  58. 2026-08-08 02:02 UTCEG score recompute
  59. 2026-08-08 02:02 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  60. 2026-08-07 16:30 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  61. 2026-08-07 01:15 UTCEG score recompute
  62. 2026-08-07 01:15 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  63. 2026-08-06 13:47 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  64. 2026-08-05 21:27 UTCEG score recompute
  65. 2026-08-05 21:27 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  66. 2026-08-05 19:17 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  67. 2026-08-04 15:10 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  68. 2026-08-04 10:39 UTCEPSS rescoreEPSS 0.3% · 18th percentile
  69. 2026-08-03 20:12 UTCEG score recompute
  70. 2026-08-03 20:12 UTCGHSA enrichmentGHSA-4cvj-xf75-4wv6 · GitHub severity LOW · GitHub CVSS 6.3
  71. 2026-08-03 10:36 UTCEPSS rescoreEPSS 0.3% · 18th percentile

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Frequently asked(5)

What is CVE-2026-8786?
CVE-2026-8786 is a medium-severity vulnerability; its CVE record was published on May 18, 2026. A vulnerability has been found in Tencent WeKnora up to 0.3.6. Affected by this issue is the function getKnowledgeBaseForInitialization of the file internal/handler/initialization.go of the component Config API Endpoint. The manipulation of the argument kbId leads to authorization bypass. It is…
When was the CVE record for CVE-2026-8786 published?
The CVE record for CVE-2026-8786 was published on May 18, 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 May 19, 2026; the record at its source may have been updated since.
Is CVE-2026-8786 actively exploited?
CVE-2026-8786 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-8786?
CVE-2026-8786 has a CVSS v3 base score of 6.3 (NVD).
How do I remediate CVE-2026-8786?
No fix for CVE-2026-8786 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The CVE record's description, written by its CNA (VulDB), states the affected versions: "A vulnerability has been found in Tencent WeKnora up to 0.3.6." No release containing a fix is confirmed on record. The vendor advisories EchelonGraph has for CVE-2026-8786 are linked in the Vendor Advisories panel on this page.

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