CVE-2026-33587

CRITICALNVD 10.010.0—
EchelonGraph scoreMEDIUM confidence

Score 10.0 from GitHub Security Advisory (severity: CRITICAL) published 2026-05-07. NVD baseline CVSS 10.0; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
10.0EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 10.0Exploit: None knownExposed: 0

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

Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and subsequently OS commands) on the docker container via Server-Side Template Injection (SSTI) for user-created transformations.

CVSS v3
10.0
EG Score
10.0(medium)
EG Risk
45(Track)
EG Risk 45/100SSVC: 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
Severity100% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
14%
KEV
Not listed

Published

May 7, 2026

Last Modified

May 7, 2026

Advisory Details (1)

Auto-updated Sep 9, 2026
Patch available. Sources: github.
github Patch Available

Remote Code Execution via Jinja2 Server-Side Template Injection in transformations · Advisory · lfnovo/open-notebook · GitHub

Affected: v1.8.4. The ai-prompter dependency was bumped to 0.4.0 which uses Jinja2

https://github.com/lfnovo/open-notebook/security/advisories/GHSA-f35w-wx37-26q7

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 8× 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 295 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 15:23 UTCOSV refresh
  5. 2026-09-11 14:53 UTCEPSS rescore
  6. 2026-09-11 09:37 UTCEPSS rescore
  7. 2026-09-10 09:34 UTCEPSS rescore
  8. 2026-09-08 22:00 UTCEPSS rescore
  9. 2026-09-07 16:01 UTCEPSS rescore
  10. 2026-09-06 13:47 UTCEPSS rescore
  11. 2026-09-06 13:47 UTCEPSS rescore
  12. 2026-09-02 14:11 UTCEPSS rescore
  13. 2026-09-01 13:53 UTCEPSS rescore
  14. 2026-09-01 04:39 UTCEPSS rescore
  15. 2026-09-01 04:39 UTCEPSS rescore
  16. 2026-08-30 19:17 UTCEPSS rescore
  17. 2026-08-30 01:22 UTCEPSS rescore
  18. 2026-08-28 21:41 UTCEPSS rescore
  19. 2026-08-27 14:25 UTCEPSS rescore
  20. 2026-08-26 14:46 UTCEPSS rescore
  21. 2026-08-25 13:49 UTCEPSS rescore
  22. 2026-08-24 14:17 UTCEPSS rescore
  23. 2026-08-23 19:37 UTCEG score recompute
  24. 2026-08-23 19:37 UTCGHSA enrichment
  25. 2026-08-23 00:19 UTCEPSS rescore
Show 75 more
  1. 2026-08-21 23:49 UTCEPSS rescore
  2. 2026-08-20 22:55 UTCEPSS rescore
  3. 2026-08-20 22:55 UTCEPSS rescore
  4. 2026-08-19 17:03 UTCEPSS rescore
  5. 2026-08-18 13:48 UTCEPSS rescore
  6. 2026-08-17 13:47 UTCEPSS rescore
  7. 2026-08-17 12:47 UTCEG score recompute
  8. 2026-08-17 12:47 UTCGHSA enrichment
  9. 2026-08-16 14:56 UTCEPSS rescore
  10. 2026-08-16 09:13 UTCGHSA enrichment
  11. 2026-08-16 04:44 UTCEG score recompute
  12. 2026-08-16 04:44 UTCGHSA enrichment
  13. 2026-08-16 02:14 UTCEPSS rescore
  14. 2026-08-15 01:30 UTCEPSS rescore
  15. 2026-08-15 01:28 UTCGHSA enrichment
  16. 2026-08-14 21:05 UTCGHSA enrichment
  17. 2026-08-14 16:42 UTCGHSA enrichment
  18. 2026-08-14 12:05 UTCGHSA enrichment
  19. 2026-08-14 07:42 UTCGHSA enrichment
  20. 2026-08-14 03:19 UTCEG score recompute
  21. 2026-08-14 03:19 UTCGHSA enrichment
  22. 2026-08-13 22:00 UTCEPSS rescore
  23. 2026-08-13 10:49 UTCGHSA enrichment
  24. 2026-08-13 06:06 UTCGHSA enrichment
  25. 2026-08-13 01:41 UTCGHSA enrichment
  26. 2026-08-12 21:18 UTCGHSA enrichment
  27. 2026-08-12 16:54 UTCEG score recompute
  28. 2026-08-12 16:54 UTCGHSA enrichment
  29. 2026-08-12 13:50 UTCEPSS rescore
  30. 2026-08-12 00:46 UTCGHSA enrichment
  31. 2026-08-11 20:23 UTCGHSA enrichment
  32. 2026-08-11 15:57 UTCEG score recompute
  33. 2026-08-11 15:57 UTCGHSA enrichment
  34. 2026-08-11 10:46 UTCGHSA enrichment
  35. 2026-08-11 05:50 UTCGHSA enrichment
  36. 2026-08-11 01:26 UTCEG score recompute
  37. 2026-08-11 01:26 UTCGHSA enrichment
  38. 2026-08-11 00:00 UTCEPSS rescore
  39. 2026-08-10 10:29 UTCGHSA enrichment
  40. 2026-08-10 06:07 UTCGHSA enrichment
  41. 2026-08-10 01:40 UTCGHSA enrichment
  42. 2026-08-09 21:17 UTCGHSA enrichment
  43. 2026-08-09 16:54 UTCEG score recompute
  44. 2026-08-09 16:54 UTCGHSA enrichment
  45. 2026-08-09 13:46 UTCEPSS rescore
  46. 2026-08-09 12:32 UTCGHSA enrichment
  47. 2026-08-09 06:53 UTCGHSA enrichment
  48. 2026-08-09 02:30 UTCEG score recompute
  49. 2026-08-09 02:30 UTCGHSA enrichment
  50. 2026-08-08 16:37 UTCEPSS rescore
  51. 2026-08-08 11:22 UTCGHSA enrichment
  52. 2026-08-08 06:59 UTCGHSA enrichment
  53. 2026-08-08 02:36 UTCGHSA enrichment
  54. 2026-08-07 22:13 UTCGHSA enrichment
  55. 2026-08-07 17:50 UTCEG score recompute
  56. 2026-08-07 17:50 UTCGHSA enrichment
  57. 2026-08-07 13:27 UTCGHSA enrichment
  58. 2026-08-07 09:04 UTCGHSA enrichment
  59. 2026-08-07 01:49 UTCGHSA enrichment
  60. 2026-08-06 21:17 UTCGHSA enrichment
  61. 2026-08-06 16:54 UTCEG score recompute
  62. 2026-08-06 16:54 UTCGHSA enrichment
  63. 2026-08-06 13:46 UTCEPSS rescore
  64. 2026-08-06 11:24 UTCGHSA enrichment
  65. 2026-08-06 07:00 UTCGHSA enrichment
  66. 2026-08-06 02:37 UTCGHSA enrichment
  67. 2026-08-05 22:15 UTCEG score recompute
  68. 2026-08-05 22:15 UTCGHSA enrichment
  69. 2026-08-05 19:17 UTCEPSS rescore
  70. 2026-08-04 15:10 UTCEPSS rescore
  71. 2026-08-04 10:38 UTCEPSS rescore
  72. 2026-08-04 04:25 UTCGHSA enrichment
  73. 2026-08-04 00:02 UTCGHSA enrichment
  74. 2026-08-03 19:38 UTCEG score recompute
  75. 2026-08-03 19:38 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-33587?
CVE-2026-33587 is a critical vulnerability published on May 7, 2026. Lack of user input sanitisation in Open Notebook v1.8.3 allows the application user to execute Python code (and subsequently OS commands) on the docker container via Server-Side Template Injection (SSTI) for user-created transformations.
When was CVE-2026-33587 disclosed?
CVE-2026-33587 was first published in the National Vulnerability Database on May 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-33587 actively exploited?
CVE-2026-33587 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 86.2% of all scored CVEs.
What is the CVSS score of CVE-2026-33587?
CVE-2026-33587 has a CVSS v3 base score of 10.0 (NVD).
How do I remediate CVE-2026-33587?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-33587, 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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