VulnSocial

CVE-2026-78682General(nltk / nltk)

LOWCVSS 8.7 · HIGH

Signal is active with 1 mentions in latest observed window

Immediate actions

  • Track advisory updates for patch or workaround availability

Recommended action window: Monitor and triage in normal cycle

NVD description

NLTK before 3.10.3 contains a server-side request forgery vulnerability in nltk.pathsec.urlopen (and callers nltk.data.load, nltk.downloader.Downloader.index/download) when an HTTP proxy is configured. pathsec.urlopen validates the requested hostname locally, but proxy-handler inheritance disables the safe HTTP/HTTPS handlers so the actual fetch is performed by the proxy against a destination that is never re-validated. An attacker can supply a validated public URL that the proxy forwards to an internal loopback-only service, allowing disclosure of internal HTTP resources, loading of forged downloader indexes, and installation of attacker-chosen package content.

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0.0/ 10 priority

Sources & remediation

Exploit / PoC references
Vendor / third-party advisories
Weakness type (CWE)
CWE-918

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

STABLE

Are you affected?

If you run products in this scope, you should treat this CVE as relevant to your environment.

  • nltk

Threat summary

  • 2 mentions across 2 observed days
  • Momentum state: stable

What's happening

  • Technical details provided in 2 signals
  • General: 1 classified signal
  • Disclosure: 1 classified signal
  • Peaked 1d ago at 1 mentions (2026-08-25); latest day: 1
  • 2 total mentions across 2 days

Affected systems

Vendors
nltk
Products
nltk

Deep dive

Activity timeline2 mentions / 2d
00111Mentions · 2026-08-25: 1Mentions · 2026-09-08: 1Technical Details · 2026-08-25: 1Technical Details · 2026-09-08: 108-2509-08
Signal classification2 categories
General
150.0%
Disclosure
150.0%
Referenced assets2 URLs
Classification over time
DateTotalLabels
2026-08-251
General1
2026-09-081
Disclosure1
Full discourse2 posts
  • DailyCVE@dailycve
    Disclosure

    🔴 NLTK (Natural Language Toolkit) Proxy SSRF Bypass, #CVE-2026-78682 (High) -DC-Sep2026-2227 https://dailycve.com/nltk-natural-language-toolkit-proxy-ssrf-bypass-cve-2026-78682-high-dc-sep2026-2227/

    Post summary

    A high‑severity SSRF bypass vulnerability has been disclosed for NLTK (CVE‑2026‑78682). The announcement details the vulnerability type but does not provide a proof of concept, exploit code, patch information, or evidence of active exploitation.

    0000039
    236 followersView on X
  • Vulmon Vulnerability Feed@VulmonFeeds
    General

    CVE-2026-78682 Server-Side Request Forgery in NLTK Versions Before 3.10.3 via HTTP Proxy https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-78682

    Post summary

    The text provides a concise title indicating an SSRF vulnerability in NLTK before version 3.10.3, linking to a Vulmon reference, but offers no further technical details or context.

    00000108
    4.1K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appnltknltk---

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