CVE-2026-40959

CRITICALNVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-04-16. NVD baseline CVSS 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
Trending — 3 sources updated this week
9.3
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 9.3Exploit: NoneExposed: 0

A fix is available — apply it.

Luanti 5 before 5.15.2, when LuaJIT is used, allows a Lua sandbox escape via a crafted mod.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
42(Track)
EG Risk 42/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
8.0%
KEV
Not listed

Published

April 16, 2026

Last Modified

May 19, 2026

Advisory Details (3)

Auto-updated May 19, 2026
Patch available. Sources: github.
github Patch Available

Mod security sandbox escape · Advisory · luanti-org/luanti · GitHub

https://github.com/luanti-org/luanti/security/advisories/GHSA-g596-mf82-w8c3
generic

Lua API: Sanitize the environment of safe functions (#16985) · luanti-org/luanti@8a929df · GitHub

https://github.com/luanti-org/luanti/commit/8a929dfb97aa08337f49ba1bb96a56d6557dc896
generic

Lua API: Sanitize the environment of safe functions (#16985) · luanti-org/luanti@53cef18 · GitHub

https://github.com/luanti-org/luanti/commit/53cef183e2a85a4daff84ac1a9a7946f940da8f8

Patch Availability(1)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuminetest-server (5.10.0+dfsg-5+deb13u1build0.25.10.1) @ questing2026-06-15ubuntu

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Weakness Classification(1)

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

All Vendor Advisories

(1)

Every vendor that published an advisory referencing this CVE — pulled from our cve_vendor_advisories aggregation. Click any row for the vendor's original advisory page.

Data Freshness Timeline

(refreshed 9× in last 7d / 34× 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 139 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-40959?
CVE-2026-40959 is a critical vulnerability published on April 16, 2026. Luanti 5 before 5.15.2, when LuaJIT is used, allows a Lua sandbox escape via a crafted mod.
When was CVE-2026-40959 disclosed?
CVE-2026-40959 was first published in the National Vulnerability Database on April 16, 2026, with the most recent update on May 19, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-40959 actively exploited?
CVE-2026-40959 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 8.0% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-40959?
CVE-2026-40959 has a CVSS v3 base score of 9.3 (NVD).
How do I remediate CVE-2026-40959?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-40959, 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.

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