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CVE-2026-78681Disclosure(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 versions before 3.10.3 use xml.etree.ElementTree to parse XML in multiple modules, which honors entity declarations in document DTDs. Attackers can craft XML payloads with nested entity declarations that expand from hundreds of bytes to megabytes in memory, causing denial of service.

nltk CVEsBack to dashboard
0.0/ 10 priority

Sources & remediation

Exploit / PoC references
Vendor / third-party advisories
Weakness type (CWE)
CWE-776

Priority

LOW

Exploitation

NONE

PoC

YES

Patch

NONE

Momentum

NONE

Are you affected?

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

  • nltk

Threat summary

  • 1 mentions across 1 observed day

What's happening

  • Technical details provided in 1 signal
  • Disclosure: 1 classified signal
  • 1 total mentions across 1 day

Affected systems

Vendors
nltk
Products
nltk

Deep dive

Activity timeline1 mentions / 1d
00111Mentions · 2026-08-25: 1Technical Details · 2026-08-25: 108-25
Signal classification1 categories
Disclosure
1100.0%
Referenced assets1 URL
By indicator
Full discourse1 post
  • Vulmon Vulnerability Feed@VulmonFeeds
    Disclosure

    CVE-2026-78681 Denial of Service in NLTK Versions Before 3.10.3 via XML Entity Expansion https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-78681

    Post summary

    CVE‑2026‑78681 is a DoS vulnerability in NLTK versions prior to 3.10.3 triggered by XML entity expansion, with no PoC, exploit code, or patch discussed.

    00000124
    4.1K followersView on X
CPE platform detail1 entries

1 of 1 entries

PartVendorProductVersionTarget SWTarget HW
Appnltknltk---

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