VDB

CVE-2026-81726

CVE-2026-81726 PUBLISHED CVSS 8.3 HIGH

Reported by VulnCheck · Published August 27, 2026

NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforcement by using raw file operations on caller-controlled paths. Attackers can read or write files outside allowed sandbox roots through TransitionParser, AveragedPerceptron, PerceptronTagger, and maxent parameter APIs when pathsec is enabled.

Risk Scores

CVSS 4.0
8.3
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:L/VA:L/SC:N/SI:N/SA:N

Affected Products

VendorProductVersions
nltknltk0, 3.10.4
chainguardapache-beam-python-3.14-sdk0
chainguardopen-webui0
chainguardlabel-studio0
chainguardapache-beam-python-3.13-sdk0
chainguardvllm-omni-cuda-13.00
chainguardapache-beam-python-3.12-sdk0
chainguardapache-beam-python-3.11-sdk0
PyPInltk0
wolfiopen-webui0
nltknltk0, 3.10.4

Timeline

  • Aug 27, 2026 Coalition ESS Score
  • Aug 27, 2026 CVE Published
  • Aug 28, 2026 EPSS Score
  • Sep 1, 2026 EPSS Score
  • Sep 2, 2026 Security Advisory
  • Sep 8, 2026 EPSS Score
  • Sep 9, 2026 EPSS Score
  • Sep 12, 2026 EPSS Score
  • Sep 16, 2026 EPSS Score
  • Sep 18, 2026 EPSS Score
  • Sep 24, 2026 EPSS Score
  • Sep 25, 2026 EPSS Score

References

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