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Natural Language Toolkit (NLTK): DNS-rebinding SSRF filter bypass in nltk.pathsec.urlopen (nltk.download / nltk.data.load) defeats ENFORCE mode
Natural Language Toolkit (NLTK): DNS-rebinding SSRF filter bypass in nltk.pathsec.urlopen (nltk.download / nltk.data.load) defeats ENFORCE mode
Affected packages
- nltk— before 3.10.0
Exploit signal
- Known exploited (CISA KEV)
- No
- EPSS score
- —
- EPSS percentile
- —
EPSS is the probability a CVE is exploited in the wild; percentile is its rank among all CVEs.
Sources
- https://github.com/nltk/nltk/security/advisories/GHSA-qvv7-cg9c-w4x3
- https://github.com/nltk/nltk
- https://pypi.org/project/nltk
- https://github.com/advisories/GHSA-qvv7-cg9c-w4x3
- https://nvd.nist.gov/vuln/detail/CVE-2026-12075
Structured record: https://osv.dev/vulnerability/PYSEC-2026-3583
Recommended response stack
Snyk — Scan your dependencies in CI and fix this vulnerability.→Socket — Detect malicious and compromised packages before they ship.→
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