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
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 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 PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

April 16, 2026

Last Modified

May 19, 2026

Advisory Details (3)

Auto-updated Sep 15, 2026
Patch available. Sources: github_commit, 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
github_commit

commit 8a929dfb97aa (luanti-org/luanti)

Fix landed in luanti-org/luanti commit 8a929dfb97aa — awaiting tagged release

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

commit 53cef183e2a8 (luanti-org/luanti)

Fix landed in luanti-org/luanti commit 53cef183e2a8 — awaiting tagged release

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.

Affected Packages

(2 across 2 ecosystems)
Debian:13(1)
PackageVulnerable rangeFixed inDependents
luanti5.10.0+dfsg-55.10.0+dfsg-5+deb13u1—
Debian:14(1)
PackageVulnerable rangeFixed inDependents
luanti5.10.0+dfsg-5 ... 5.15.1+dfsg-2 (6 versions)5.15.2+dfsg-1—

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 7× in last 7d / 28× 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 284 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 92.1% of all scored CVEs.
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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