CVE•Published 2026-08-25•Modified 2026-08-31•1 article on news•5 live references•NVD data
CVE-2026-79657Nltk · Nltk
Vulnerability data via NVD (ingested)
CVSS v3.1
9.8
CRITICAL
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS percentile
65
Exploit Prediction Scoring System · top 35% of all CVEs
Weaknesses (CWE)
Description
NLTK versions before 3.10.3 contain a remote code execution vulnerability in allowlisted pickle loaders that trust entire module namespaces instead of specific safe callables. Attackers can craft malicious pickle payloads invoking dangerous in-namespace functions like ReppTokenizer._execute and numpy.f2py.crackfortran.myeval through pickle REDUCE to execute arbitrary commands during model or tokenizer artifact loading.
Timeline
Published 2026-08-25
Modified 2026-08-31
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
Shodan · vuln tag0 hosts
vuln:CVE-2026-79657Hosts Shodan has explicitly fingerprinted as vulnerable.
Shodan · product
product:"Nltk Nltk"All exposed Nltk Nltk instances — cross-reference with the CVE's affected-version range.
Shodan · banner/body mention
http.html:"Nltk"HTTP body or banner mentions "Nltk" — catches deploys Shodan didn't identify as a product.
More intel sources (5)
Shodan report
vuln:CVE-2026-79657Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-79657Censys host search filtered to this CVE id.
grep.app
CVE-2026-79657Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-79657GitHub code search for direct mentions.
Google dork
"CVE-2026-79657" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub
No public proof-of-concept repositories found for CVE-2026-79657 on GitHub.