CVE-2026-59255

HIGHPre-NVD 7.17.1
EchelonGraph scoreMEDIUM confidence

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

Score 7.1 from GitHub Security Advisory (severity: HIGH) published 2026-07-15. The CNA's CVSS baseline 7.1; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: the CNA's CVSS, EPSS, GitHub Security Advisory
Trending — 3 sources updated this weekElevated
7.1EG
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: 7.1Exploit: No code on recordExposed services: Not assessed

An upstream fix is merged but not yet released — mitigate (WAF / firewall / segmentation) until the release ships, then apply it.

BloodHound through 9.4.0, fixed in commit 8f79035, contains a missing authorization vulnerability in the custom-nodes API endpoints that allows any authenticated user to modify the global graph schema. Attackers with valid session tokens can create, update, or delete custom node types affecting all users and tenants by invoking unprotected POST, PUT, and DELETE operations on the custom-nodes endpoints.

CVSS v3
7.1
EG Score
7.1HIGHmedium confidence
EG Risk
48
EG Risk 48/100

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)
Severity71% × 45%
The EG Score, 7.1 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: An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.
EPSS PROB
0.4%
EPSS %ILE
36th
KEV
Not listed

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

An upstream fix is merged but not yet in a tagged release. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines until it ships, then apply the release.

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

July 15, 2026

Last Modified

September 17, 2026

Advisory Details (4)

Auto-updated Jul 15, 2026
Upstream fix merged — awaiting tagged release. Sources: github_commit, github_pr.
Web page

BloodHound Missing Authorization on Custom Node Management API | Advisories | VulnCheck

https://www.vulncheck.com/advisories/bloodhound-missing-authorization-on-custom-node-management-api
GitHub pull request

fix: enforce opengraph permissions on custom node kind endpoints - BED-8970

Fix merged in SpecterOps/BloodHound PR #2989 on 2026-07-13 — awaiting tagged release

https://github.com/SpecterOps/BloodHound/pull/2989
Web page

Bug: Missing Authorization on Custom Node Kind Management API Allows Any Authenticated User to Modify Global Graph Schema · Issue #2910 · SpecterOps/BloodHound · GitHub

https://github.com/SpecterOps/BloodHound/issues/2910
GitHub commit

commit 8f790351349f (SpecterOps/BloodHound)

Fix landed in SpecterOps/BloodHound commit 8f790351349f — awaiting tagged release

https://github.com/SpecterOps/BloodHound/commit/8f790351349fd87bcb04377aba84cba6495825b3

Vendor Advisories for CVE-2026-59255(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 13× in last 7d / 48× 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 230 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 130 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-13 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  2. 2026-10-13 16:01 UTCEG score recompute
  3. 2026-10-13 16:00 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  4. 2026-10-12 16:34 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  5. 2026-10-12 15:52 UTCEG score recompute
  6. 2026-10-11 19:36 UTCEG score recompute
  7. 2026-10-11 16:51 UTCEG score recompute
  8. 2026-10-11 14:14 UTCEG score recompute
  9. 2026-10-11 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  10. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  11. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  12. 2026-10-08 17:13 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  13. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  14. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  15. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  16. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  17. 2026-10-03 14:26 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  18. 2026-10-02 17:56 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  19. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  20. 2026-10-01 12:40 UTCEG score recompute
  21. 2026-10-01 12:40 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  22. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  23. 2026-09-29 15:22 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  24. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  25. 2026-09-28 08:44 UTCEG score recompute
Show 75 more
  1. 2026-09-28 08:44 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  2. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  3. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  4. 2026-09-24 14:04 UTCEPSS rescoreEPSS 0.4% · 35th percentile
  5. 2026-09-24 08:49 UTCEG score recompute
  6. 2026-09-24 08:49 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  7. 2026-09-23 17:54 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  8. 2026-09-23 03:16 UTCEG score recompute
  9. 2026-09-23 03:16 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  10. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  11. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  12. 2026-09-18 07:21 UTCEG score recompute
  13. 2026-09-18 07:21 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  14. 2026-09-17 19:31 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  15. 2026-09-17 19:11 UTCEG score recompute
  16. 2026-09-17 19:10 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  17. 2026-09-17 18:27 UTCEG score recompute
  18. 2026-09-17 18:27 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  19. 2026-09-17 18:15 UTCEG score recompute
  20. 2026-09-17 18:14 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  21. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  22. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  23. 2026-09-15 03:11 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  24. 2026-09-14 11:23 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  25. 2026-09-13 23:12 UTCEG score recompute
  26. 2026-09-13 23:12 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  27. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  28. 2026-09-13 07:13 UTCEG score recompute
  29. 2026-09-13 07:13 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  30. 2026-09-12 13:02 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  31. 2026-09-11 21:45 UTCEG score recompute
  32. 2026-09-11 21:45 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  33. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  34. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.4% · 37th percentile
  35. 2026-09-08 22:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  36. 2026-09-08 00:51 UTCEG score recompute
  37. 2026-09-08 00:50 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  38. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  39. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  40. 2026-09-06 13:28 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  41. 2026-09-05 20:50 UTCEG score recompute
  42. 2026-09-05 20:50 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  43. 2026-09-04 05:07 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  44. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  45. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  46. 2026-09-01 04:40 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  47. 2026-08-31 04:33 UTCEG score recompute
  48. 2026-08-31 04:33 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  49. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  50. 2026-08-30 16:03 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  51. 2026-08-30 03:51 UTCEG score recompute
  52. 2026-08-30 03:51 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  53. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  54. 2026-08-28 21:42 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  55. 2026-08-28 01:52 UTCEG score recompute
  56. 2026-08-28 01:52 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  57. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  58. 2026-08-27 12:39 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  59. 2026-08-26 23:07 UTCEG score recompute
  60. 2026-08-26 23:07 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  61. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  62. 2026-08-26 07:30 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  63. 2026-08-25 19:01 UTCEG score recompute
  64. 2026-08-25 19:01 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  65. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.4% · 36th percentile
  66. 2026-08-25 04:12 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  67. 2026-08-24 16:00 UTCEG score recompute
  68. 2026-08-24 15:59 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  69. 2026-08-24 03:46 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  70. 2026-08-23 13:33 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  71. 2026-08-23 01:22 UTCEG score recompute
  72. 2026-08-23 01:22 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  73. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.2% · 16th percentile
  74. 2026-08-22 13:09 UTCGHSA enrichmentGHSA-7qmq-x64g-8v7j · GitHub severity HIGH · GitHub CVSS 7.1
  75. 2026-08-22 00:58 UTCEG score recompute

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Frequently asked(5)

What is CVE-2026-59255?
CVE-2026-59255 is a high-severity vulnerability; its CVE record was published on July 15, 2026. BloodHound through 9.4.0, fixed in commit 8f79035, contains a missing authorization vulnerability in the custom-nodes API endpoints that allows any authenticated user to modify the global graph schema. Attackers with valid session tokens can create, update, or delete custom node types affecting all…
When was CVE-2026-59255 made public?
CVE-2026-59255 was made public on June 20, 2026: that is the date its CVE record's CNA, VulnCheck, gives for when the vulnerability was made public. The CVE record itself was published on July 15, 2026. EchelonGraph's copy of the record carries a last-modified date of September 17, 2026; the record at its source may have been updated since.
Is CVE-2026-59255 actively exploited?
CVE-2026-59255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (36th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-59255?
CVE-2026-59255 has a CVSS base score of 7.1 (the CNA's own assessment, by vulncheck; NVD's own analysis pending).
How do I remediate CVE-2026-59255?
An upstream fix for CVE-2026-59255 has been merged but is not yet in a tagged release. Until it ships, restrict network exposure of the affected system or apply the vendor's mitigation, then update to the release that contains the fix. The vendor advisories EchelonGraph has for CVE-2026-59255 are linked in the Vendor Advisories panel on this page.

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