CVE-2026-0846High· 7.5▾ MidnightPoC availableA flaw was found in the `nltk` component. This vulnerability, specifically within the `filestring()` function of the `nltk.util` module, allows an attacker to perform arbitrary file reads. By providing specially crafted input paths, either…
▾ Midnight zone — Critical, or high with PoC / in-the-wild
impact 41.3 · likelihood 0.1 · exploitation 12
A public proof-of-concept already exists for this vulnerability — see Exploit availability below.
Stakeholder-Specific Vulnerability Categorization from CISA's ADP record at CVE.org: whether exploitation is observed, whether an attack can be automated, and how much of the system is at stake. The CVSS score shown above comes from the vendor's CSAF advisory record, not NVD.
Exploit-prediction probability, daily snapshots since Sep 16.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via CSAF
0.4%
8.6 → 7.5
Last analysed / modified upstream
0.4% → 0.6%
A flaw was found in the nltk component. This vulnerability, specifically within the filestring() function of the nltk.util module, allows an attacker to perform arbitrary file reads. By providing specially crafted input paths, either absolute or using directory traversal, an attacker can bypass input validation and access sensitive system files. This can be exploited both locally and remotely, particularly when the function processes user-supplied input in applications like web APIs.
nltk: NLTK: Arbitrary file read via improper path validation in filestring() function — rated Important by Red Hat. Released 2026-03-09, updated 2026-10-15.
Affected:
Fixed:
No fix planned:
Not affected:
For Red Hat OpenShift AI 2.25.5 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update:
https://docs.redhat.com/en/documentation/red_hat_openshift_ai/ https://access.redhat.com/errata/RHSA-2026:10184 For Red Hat OpenShift AI 3.3.3 see the following documentation, which will be updated shortly for this release, for important instructions on how to upgrade your cluster and fully apply this errata update:
https://docs.redhat.com/en/documentation/red_hat_openshift_ai/ https://access.redhat.com/errata/RHSA-2026:19712
Field changes observed since this record was first indexed.
Connected by shared product, vendor, weakness, or advisory.
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