CVE-2026-31226

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-12. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

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

The TinyZero project thru commit 6652a63c57fa7e5ccde3fc9c598c7176ff15b839 (2025-58-24) contains a critical command injection vulnerability (CWE-78) in its HDFS file operation utilities. The vulnerability arises from the unsafe construction and execution of shell commands via os.system() without proper input sanitization or escaping. User-controlled input (such as file paths) is directly interpolated into shell command strings using f-strings within the _copy() function. An attacker can inject arbitrary OS commands by supplying a specially crafted path parameter through the Hydra configuration framework. This leads to remote code execution with the privileges of the user running the TinyZero training process.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
60(Track)
EG Risk 60/100SSVC: 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
Severity98% × 45%
Exploitation1% × 40%
Automatability100% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
65%
KEV
Not listed

Published

May 12, 2026

Last Modified

May 19, 2026

Advisory Details (2)

Auto-updated Sep 9, 2026
No patch confirmed yet.
generic

GitHub - Jiayi-Pan/TinyZero: Minimal reproduction of DeepSeek R1-Zero · GitHub

https://github.com/Jiayi-Pan/TinyZero
generic

Notion

https://www.notion.so/CVE-2026-31226-35d1e139318881d19af5d63095c74579

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 5× in last 7d / 35× 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 332 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-31226?
CVE-2026-31226 is a critical vulnerability published on May 12, 2026. The TinyZero project thru commit 6652a63c57fa7e5ccde3fc9c598c7176ff15b839 (2025-58-24) contains a critical command injection vulnerability (CWE-78) in its HDFS file operation utilities. The vulnerability arises from the unsafe construction and execution of shell commands via os.system() without…
When was CVE-2026-31226 disclosed?
CVE-2026-31226 was first published in the National Vulnerability Database on May 12, 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-2026-31226 actively exploited?
CVE-2026-31226 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 34.7% of all scored CVEs.
What is the CVSS score of CVE-2026-31226?
CVE-2026-31226 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-31226?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-31226, 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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