CVE Feed

    Dashboard / CVE / CVE-2026-70626

    CVE-2026-70626

    NLTK versions before 3.9.4 contain a symlink escape vulnerability in CorpusReader.open() that allows local attackers to read arbitrary files outside the corpus root. The vulnerability exists because path validation is lexical and does not account for symlink resolution, enabling attackers to place symlinks inside the corpus root to access files outside the intended boundary.

    Published:Aug 22, 2026
    Last Modified:Aug 28, 2026
    EPS:Aug 22, 2026
    EPSS Score:0.00143
    CVSS Score:6.2

    Affected Products

    Vendor
    Nltk
    Product
    Nltk

    Exploits

    https://github.com/nltk/nltk/security/advisories/GHSA-r6gq-whwq-mvg9https://github.com/nltk/nltk/security/advisories/GHSA-r6gq-whwq-mvg9

    Related CVEs

    CVE-2026-81727 (CVSS 6.9) — NLTK versions before 3.10.3 contain a filesystem containment bypass vulnerability in the Downloader.download a…
    CVE-2026-81725 (CVSS 6.3) — NLTK before 3.10.3 contains a regular expression denial of service vulnerability in Pl196xCorpusReader that al…
    CVE-2026-81726 (CVSS 8.3) — NLTK through 3.10.3 contains a path traversal vulnerability in model-artifact APIs that bypass pathsec enforce…
    CVE-2026-81724 (CVSS 6.9) — NLTK before 3.10.3 contains an uncontrolled recursion vulnerability in nltk.featstruct.FeatStructReader that a…
    CVE-2026-81723 (CVSS 6.3) — NLTK versions before 3.10.3 contain a quadratic CPU exhaustion vulnerability in XMLCorpusView._read_xml_fragme…
    CVE-2026-81722 (CVSS 8.7) — nltk PorterStemmer in versions <= 3.10.2 (fixed in 3.10.3) contains an inefficient-algorithmic-complexity deni…
    CVE-2026-80206 (CVSS 8.2) — NLTK before 3.10.3 contains a regular expression denial of service (ReDoS) vulnerability in the tgrep module. …
    CVE-2026-80205 (CVSS 8.7) — NLTK versions before 3.10.0 contain a regular expression denial of service vulnerability in Text.findall() and…
    CVE-2026-79676 (CVSS 8.2) — NLTK versions before 3.10.3 contain a path traversal vulnerability in corpus readers that reopen root-derived …
    CVE-2026-79674 (CVSS 8.8) — NLTK versions before 3.10.3 contain a path sandbox bypass vulnerability in corpus-reader constructors that all…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High