CVE-2026-13435

CRITICALPre-NVD 9.99.9—
EchelonGraph scoreHIGH 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 a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.9Exploit: None knownExposed: 0

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

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
9.9(high)
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
Severity99% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
22%
KEV
Not listed

Published

July 30, 2026

Last Modified

August 4, 2026

Advisory Details (1)

Auto-updated Aug 18, 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 58× in last 7d / 188× 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 188 total refreshes for this CVE.

  1. 2026-08-21 08:53 UTCGHSA enrichment
  2. 2026-08-21 05:10 UTCGHSA enrichment
  3. 2026-08-21 01:28 UTCEG score recompute
  4. 2026-08-21 01:28 UTCGHSA enrichment
  5. 2026-08-20 22:55 UTCEPSS rescore
  6. 2026-08-20 21:47 UTCGHSA enrichment
  7. 2026-08-20 18:05 UTCGHSA enrichment
  8. 2026-08-20 14:23 UTCGHSA enrichment
  9. 2026-08-20 10:18 UTCGHSA enrichment
  10. 2026-08-20 06:36 UTCGHSA enrichment
  11. 2026-08-20 02:53 UTCGHSA enrichment
  12. 2026-08-19 23:11 UTCGHSA enrichment
  13. 2026-08-19 19:29 UTCEG score recompute
  14. 2026-08-19 19:28 UTCGHSA enrichment
  15. 2026-08-19 17:03 UTCEPSS rescore
  16. 2026-08-19 14:40 UTCGHSA enrichment
  17. 2026-08-19 10:49 UTCGHSA enrichment
  18. 2026-08-19 07:07 UTCGHSA enrichment
  19. 2026-08-19 03:25 UTCGHSA enrichment
  20. 2026-08-18 23:19 UTCGHSA enrichment
  21. 2026-08-18 19:38 UTCGHSA enrichment
  22. 2026-08-18 15:56 UTCEG score recompute
  23. 2026-08-18 15:55 UTCGHSA enrichment
  24. 2026-08-18 13:48 UTCEPSS rescore
  25. 2026-08-18 11:00 UTCGHSA enrichment
Show 75 more
  1. 2026-08-18 07:18 UTCGHSA enrichment
  2. 2026-08-18 03:37 UTCGHSA enrichment
  3. 2026-08-17 23:29 UTCGHSA enrichment
  4. 2026-08-17 19:43 UTCGHSA enrichment
  5. 2026-08-17 15:37 UTCEG score recompute
  6. 2026-08-17 15:37 UTCGHSA enrichment
  7. 2026-08-17 11:55 UTCGHSA enrichment
  8. 2026-08-17 08:13 UTCGHSA enrichment
  9. 2026-08-17 04:32 UTCGHSA enrichment
  10. 2026-08-17 00:50 UTCGHSA enrichment
  11. 2026-08-16 21:08 UTCGHSA enrichment
  12. 2026-08-16 17:26 UTCEG score recompute
  13. 2026-08-16 17:26 UTCGHSA enrichment
  14. 2026-08-16 14:56 UTCEPSS rescore
  15. 2026-08-16 13:44 UTCGHSA enrichment
  16. 2026-08-16 10:02 UTCGHSA enrichment
  17. 2026-08-16 06:21 UTCGHSA enrichment
  18. 2026-08-16 02:39 UTCEG score recompute
  19. 2026-08-16 02:39 UTCGHSA enrichment
  20. 2026-08-16 02:14 UTCEPSS rescore
  21. 2026-08-15 22:58 UTCGHSA enrichment
  22. 2026-08-15 19:16 UTCGHSA enrichment
  23. 2026-08-15 15:34 UTCGHSA enrichment
  24. 2026-08-15 11:52 UTCGHSA enrichment
  25. 2026-08-15 08:10 UTCGHSA enrichment
  26. 2026-08-15 04:28 UTCEG score recompute
  27. 2026-08-15 04:28 UTCGHSA enrichment
  28. 2026-08-15 01:30 UTCEPSS rescore
  29. 2026-08-15 00:46 UTCGHSA enrichment
  30. 2026-08-14 21:04 UTCGHSA enrichment
  31. 2026-08-14 17:23 UTCGHSA enrichment
  32. 2026-08-14 13:39 UTCGHSA enrichment
  33. 2026-08-14 09:58 UTCGHSA enrichment
  34. 2026-08-14 06:16 UTCGHSA enrichment
  35. 2026-08-14 02:35 UTCGHSA enrichment
  36. 2026-08-13 22:53 UTCEG score recompute
  37. 2026-08-13 22:53 UTCGHSA enrichment
  38. 2026-08-13 22:00 UTCEPSS rescore
  39. 2026-08-13 19:11 UTCGHSA enrichment
  40. 2026-08-13 15:29 UTCGHSA enrichment
  41. 2026-08-13 11:45 UTCGHSA enrichment
  42. 2026-08-13 08:04 UTCGHSA enrichment
  43. 2026-08-13 04:22 UTCGHSA enrichment
  44. 2026-08-13 00:41 UTCGHSA enrichment
  45. 2026-08-12 20:59 UTCGHSA enrichment
  46. 2026-08-12 17:18 UTCEG score recompute
  47. 2026-08-12 17:18 UTCGHSA enrichment
  48. 2026-08-12 13:50 UTCEPSS rescore
  49. 2026-08-12 13:36 UTCGHSA enrichment
  50. 2026-08-12 09:54 UTCGHSA enrichment
  51. 2026-08-12 06:12 UTCGHSA enrichment
  52. 2026-08-12 02:29 UTCGHSA enrichment
  53. 2026-08-11 22:47 UTCGHSA enrichment
  54. 2026-08-11 19:06 UTCGHSA enrichment
  55. 2026-08-11 15:22 UTCEG score recompute
  56. 2026-08-11 15:22 UTCGHSA enrichment
  57. 2026-08-11 13:42 UTCEPSS rescore
  58. 2026-08-11 11:40 UTCGHSA enrichment
  59. 2026-08-11 07:58 UTCGHSA enrichment
  60. 2026-08-11 04:17 UTCGHSA enrichment
  61. 2026-08-11 00:35 UTCEG score recompute
  62. 2026-08-11 00:35 UTCGHSA enrichment
  63. 2026-08-10 23:59 UTCEPSS rescore
  64. 2026-08-10 20:54 UTCGHSA enrichment
  65. 2026-08-10 17:12 UTCGHSA enrichment
  66. 2026-08-10 13:30 UTCGHSA enrichment
  67. 2026-08-10 09:48 UTCGHSA enrichment
  68. 2026-08-10 06:07 UTCGHSA enrichment
  69. 2026-08-10 02:25 UTCGHSA enrichment
  70. 2026-08-09 22:44 UTCGHSA enrichment
  71. 2026-08-09 19:02 UTCGHSA enrichment
  72. 2026-08-09 15:21 UTCEG score recompute
  73. 2026-08-09 15:21 UTCGHSA enrichment
  74. 2026-08-09 13:46 UTCEPSS rescore
  75. 2026-08-09 11:39 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 in the National Vulnerability Database 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% probability of exploitation in the next 30 days, which ranks it in the top 77.9% of all scored CVEs.
What is the CVSS score of CVE-2026-13435?
CVE-2026-13435 has a CVSS v3 base score of 9.9 (NVD).
How do I remediate CVE-2026-13435?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-13435, 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.

Dependency Blast Radius

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