CVE-2026-62383

MEDIUMPre-NVD 5.55.5—
EchelonGraph scoreHIGH confidence

Score 5.5 from GitHub Security Advisory published 2026-08-22. a secondary CVSS source baseline 5.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.5Exploit: None knownExposed: 0

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

nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(), domains(), categories(), or fileids() methods with the symlink filename.

CVSS v3
5.5
EG Score
5.5(high)
EG Risk
25(Track)
EG Risk 25/100SSVC: 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
Severity55% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
8%
KEV
Not listed

Published

August 22, 2026

Last Modified

August 27, 2026

Advisory Details (2)

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

nltk IPIPANCorpusReader Symlink Arbitrary File Read | Advisories | VulnCheck

https://www.vulncheck.com/advisories/nltk-ipipancorpusreader-symlink-arbitrary-file-read
github Patch Available🟡 PoC Available

Symlink-based arbitrary file read in IPIPANCorpusReader, bypasses nltk.pathsec entirely · Advisory · nltk/nltk · GitHub

https://github.com/nltk/nltk/security/advisories/GHSA-3hhw-38pf-pxj6

Vendor Advisories for CVE-2026-62383(1)

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

Affected Packages

(1 across 1 ecosystem)
PyPI(1)
PackageVulnerable rangeFixed inDependents
nltk3.10.0, 3.10.13.10.2—

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 23× in last 7d / 26× 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. 2026-08-30 01:56 UTCEG score recompute
  2. 2026-08-30 01:56 UTCGHSA enrichment
  3. 2026-08-30 01:22 UTCEPSS rescore
  4. 2026-08-29 01:00 UTCEG score recompute
  5. 2026-08-29 01:00 UTCGHSA enrichment
  6. 2026-08-28 21:42 UTCEPSS rescore
  7. 2026-08-27 21:47 UTCGHSA enrichment
  8. 2026-08-27 20:37 UTCGHSA enrichment
  9. 2026-08-27 18:24 UTCEG score recompute
  10. 2026-08-27 18:24 UTCGHSA enrichment
  11. 2026-08-27 14:25 UTCEPSS rescore
  12. 2026-08-26 17:25 UTCEG score recompute
  13. 2026-08-26 17:25 UTCGHSA enrichment
  14. 2026-08-26 16:23 UTCEG score recompute
  15. 2026-08-26 16:23 UTCGHSA enrichment
  16. 2026-08-26 14:46 UTCEPSS rescore
  17. 2026-08-25 18:14 UTCEG score recompute
  18. 2026-08-25 18:14 UTCGHSA enrichment
  19. 2026-08-25 13:49 UTCEPSS rescore
  20. 2026-08-24 17:16 UTCEG score recompute
  21. 2026-08-24 17:16 UTCGHSA enrichment
  22. 2026-08-23 16:20 UTCEG score recompute
  23. 2026-08-23 16:20 UTCGHSA enrichment
  24. 2026-08-22 15:24 UTCEG score recompute
  25. 2026-08-22 14:26 UTCEG score recompute
Show 1 more
  1. 2026-08-22 14:25 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-62383?
CVE-2026-62383 is a medium vulnerability published on August 22, 2026. nltk versions before 3.10.2 contain a symlink-based arbitrary file read vulnerability in IPIPANCorpusReader methods that bypass nltk.pathsec validation entirely. Attackers can place a symlink in the corpus root directory and read arbitrary files accessible to the process by calling channels(),…
When was CVE-2026-62383 disclosed?
CVE-2026-62383 was first published in the National Vulnerability Database on August 22, 2026, with the most recent update on August 27, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-62383 actively exploited?
CVE-2026-62383 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 91.9% of all scored CVEs.
What is the CVSS score of CVE-2026-62383?
CVE-2026-62383 has a CVSS v3 base score of 5.5 (NVD).
How do I remediate CVE-2026-62383?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-62383, 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-2026-62383

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