nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences
High-risk advisory
CVE-2026-12243
Summary
nltk: Arbitrary File Read via Path Traversal in nltk.data.load() through Percent-Encoded Sequences
Why it matters
GitHub has published a reviewed security advisory for nltk. Prioritize it with other application dependency updates, especially because EPSS places it in the 45% percentile.
Operator check
Check whether nltk is present in application dependency manifests, lockfiles, or build images. Review the GitHub advisory and upgrade to a patched version where available. EPSS probability: 0.6%; percentile: 45%.
Sources
PatchBrief uses public sources. It does not scan environments, verify exposure, or replace vendor guidance.