CVE-2026-62388

HIGHPre-NVD 7.57.5—
EchelonGraph scoreHIGH confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-08-22. the CNA's CVSS baseline 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cna:vulncheck, epss, ghsa
Elevated
7.5EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.5Exploit: Elevated riskExposed: 0

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

NLTK versions before 3.10.0 default to ENFORCE=False in pathsec.py, causing all security validation functions to emit warnings instead of raising exceptions. Attackers can bypass path traversal and pickle deserialization protections by exploiting the disabled security controls that are only active when manually enabled.

CVSS v3
7.5
EG Score
7.5(high)
EG Risk
65(Attend)
EG Risk 65/100SSVC: Attend

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
Severity75% × 45%
Exploitation40% × 40%
Automatability100% × 15%
Action: Remediate soon — notable exploitation risk.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 29, 2026

Advisory Details (2)

Auto-updated Aug 22, 2026
🔬 Proof of concept available. Patch available. Sources: github.
generic

NLTK before 3.10.0 Insecure Default Configuration pathsec | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nltk-before-insecure-default-configuration-pathsec
github Patch Available🟡 PoC Available

[CWE-1188] Default ENFORCE=False Disables All pathsec Security Controls · Advisory · nltk/nltk · GitHub

https://github.com/nltk/nltk/security/advisories/GHSA-p3m8-78j2-g5p3

Vendor Advisories for CVE-2026-62388(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Affected Packages

(4 across 4 ecosystems)
Debian:12(1)
PackageVulnerable rangeFixed inDependents
nltk3.10.0-1 ... 3.9.3-1 (9 versions)——
Debian:13(1)
PackageVulnerable rangeFixed inDependents
nltk3.10.0-1 ... 3.9.3-1 (6 versions)——
Debian:14(1)
PackageVulnerable rangeFixed inDependents
nltk3.9.1-2, 3.9.2-1, 3.9.3-13.10.0-1—
PyPI(1)
PackageVulnerable rangeFixed inDependents
nltk0.8 ... 3.9b1 (65 versions)3.10.0—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 10× in last 7d / 78× 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.

  1. 2026-09-18 23:27 UTCEG score recompute
  2. 2026-09-18 19:28 UTCEPSS rescore
  3. 2026-09-18 00:06 UTCEG score recompute
  4. 2026-09-16 22:59 UTCEG score recompute
  5. 2026-09-16 14:08 UTCEPSS rescore
  6. 2026-09-16 11:18 UTCEG score recompute
  7. 2026-09-16 05:15 UTCEPSS rescore
  8. 2026-09-15 11:14 UTCEG score recompute
  9. 2026-09-13 23:18 UTCEG score recompute
  10. 2026-09-12 23:58 UTCEG score recompute
  11. 2026-09-12 00:38 UTCEG score recompute
  12. 2026-09-11 14:53 UTCEPSS rescore
  13. 2026-09-11 12:58 UTCEG score recompute
  14. 2026-09-11 09:37 UTCEPSS rescore
  15. 2026-09-10 13:33 UTCEG score recompute
  16. 2026-09-09 01:42 UTCEG score recompute
  17. 2026-09-08 22:01 UTCEPSS rescore
  18. 2026-09-07 19:49 UTCEG score recompute
  19. 2026-09-07 16:01 UTCEPSS rescore
  20. 2026-09-06 19:49 UTCEG score recompute
  21. 2026-09-06 13:47 UTCEPSS rescore
  22. 2026-09-05 20:24 UTCEG score recompute
  23. 2026-09-04 21:04 UTCEG score recompute
  24. 2026-09-04 08:20 UTCEG score recompute
  25. 2026-09-04 05:07 UTCEPSS rescore
Show 53 more
  1. 2026-09-02 21:18 UTCEG score recompute
  2. 2026-09-02 14:12 UTCEPSS rescore
  3. 2026-09-02 09:37 UTCGHSA enrichment
  4. 2026-09-01 21:56 UTCEG score recompute
  5. 2026-09-01 21:56 UTCGHSA enrichment
  6. 2026-09-01 13:54 UTCEPSS rescore
  7. 2026-09-01 10:16 UTCEG score recompute
  8. 2026-09-01 10:16 UTCGHSA enrichment
  9. 2026-09-01 04:40 UTCEPSS rescore
  10. 2026-08-31 22:30 UTCGHSA enrichment
  11. 2026-08-31 10:50 UTCGHSA enrichment
  12. 2026-08-30 23:07 UTCEG score recompute
  13. 2026-08-30 23:07 UTCGHSA enrichment
  14. 2026-08-30 19:17 UTCEPSS rescore
  15. 2026-08-30 11:27 UTCEG score recompute
  16. 2026-08-30 11:27 UTCGHSA enrichment
  17. 2026-08-30 01:22 UTCEPSS rescore
  18. 2026-08-29 23:47 UTCGHSA enrichment
  19. 2026-08-29 12:07 UTCEG score recompute
  20. 2026-08-29 12:06 UTCGHSA enrichment
  21. 2026-08-29 07:22 UTCEG score recompute
  22. 2026-08-29 07:22 UTCGHSA enrichment
  23. 2026-08-28 21:42 UTCEPSS rescore
  24. 2026-08-28 19:36 UTCGHSA enrichment
  25. 2026-08-28 07:52 UTCGHSA enrichment
  26. 2026-08-27 20:09 UTCGHSA enrichment
  27. 2026-08-27 18:18 UTCEG score recompute
  28. 2026-08-27 18:18 UTCGHSA enrichment
  29. 2026-08-27 14:25 UTCEPSS rescore
  30. 2026-08-27 06:09 UTCGHSA enrichment
  31. 2026-08-26 18:24 UTCEG score recompute
  32. 2026-08-26 18:24 UTCGHSA enrichment
  33. 2026-08-26 18:04 UTCEG score recompute
  34. 2026-08-26 18:04 UTCGHSA enrichment
  35. 2026-08-26 17:25 UTCEG score recompute
  36. 2026-08-26 17:25 UTCGHSA enrichment
  37. 2026-08-26 14:46 UTCEPSS rescore
  38. 2026-08-26 12:48 UTCGHSA enrichment
  39. 2026-08-26 01:08 UTCEG score recompute
  40. 2026-08-26 01:08 UTCGHSA enrichment
  41. 2026-08-25 13:49 UTCEPSS rescore
  42. 2026-08-25 13:26 UTCGHSA enrichment
  43. 2026-08-25 01:45 UTCEG score recompute
  44. 2026-08-25 01:45 UTCGHSA enrichment
  45. 2026-08-24 14:05 UTCEG score recompute
  46. 2026-08-24 14:05 UTCGHSA enrichment
  47. 2026-08-24 02:25 UTCGHSA enrichment
  48. 2026-08-23 14:45 UTCGHSA enrichment
  49. 2026-08-23 03:05 UTCEG score recompute
  50. 2026-08-23 03:05 UTCGHSA enrichment
  51. 2026-08-22 15:24 UTCEG score recompute
  52. 2026-08-22 14:26 UTCEG score recompute
  53. 2026-08-22 14:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62388?
CVE-2026-62388 is a high vulnerability published on August 22, 2026. NLTK versions before 3.10.0 default to ENFORCE=False in pathsec.py, causing all security validation functions to emit warnings instead of raising exceptions. Attackers can bypass path traversal and pickle deserialization protections by exploiting the disabled security controls that are only active…
When was CVE-2026-62388 disclosed?
CVE-2026-62388 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 29, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62388 actively exploited?
CVE-2026-62388 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 61.0% of all scored CVEs.
What is the CVSS score of CVE-2026-62388?
CVE-2026-62388 has a CVSS v4.0 base score of 7.5 (CNA self-assessment; NVD's own analysis pending).
How do I remediate CVE-2026-62388?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62388, 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

See which npm, PyPI, Go, and Maven packages are affected by CVE-2026-62388

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