CVE-2026-13435

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreMEDIUM confidence

Score 9.9 from GitHub Security Advisory (severity: CRITICAL) published 2026-07-30. A secondary CVSS source baseline 9.9; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
9.9EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.9Exploit: None knownExposed services: Not assessed

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

IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.

CVSS v3
9.9
EG Score
9.9CRITICALmedium confidence
EG Risk
45
EG Risk 45/100CISA SSVC

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
Severity99% × 45%
Exploitation1% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.5%
EPSS %ILE
42nd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact total (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

July 30, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Sep 30, 2026
No patch confirmed yet.
generic

Security Bulletin: Python Interpreter Sandbox Bypass Leading to Sensitive Data Exposure

https://www.ibm.com/support/pages/node/7279987

Vendor Advisories for CVE-2026-13435(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 20× in last 7d / 126× 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 397 total refreshes for this CVE.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-13435?
CVE-2026-13435 is a critical vulnerability published on July 30, 2026. IBM Langflow OSS 1.0.0 through 1.10.1 contains an improper input validation vulnerability in the PythonREPL sandbox implementation.
When was CVE-2026-13435 disclosed?
CVE-2026-13435 was first published on July 30, 2026, with the most recent update on August 4, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-13435 actively exploited?
CVE-2026-13435 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (42nd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-13435?
CVE-2026-13435 has a CVSS base score of 9.9 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-13435?
No fix for CVE-2026-13435 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-13435 are linked in the Vendor Advisories panel on this page.

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