Skip to main content
VulnerabilityPublished

CVE-2026-119051: hughsk flat · Unthrottled Resource Allocation

Affects hughsk flatSource CVE Database V5

0
Compare

Not known to be exploited · CVSS 8.2 High.

Data as of 29 Oct 2026, 14:52 UTC

CVSS 4.0 base score
8.2High
How severe the flaw is on the 0–10 CVSS scale.

Thin evidence

One scorer or none
CVSS scores by source
CNA (VulnCheck)CVSS 4.08.2
CNA (VulnCheck)CVSS 3.15.9
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 29 Oct 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq Mirage: no evidence on record.

    No attack traffic recorded by OffSeq Mirage sensors

A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 29 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
hughskflatAffected
  • <=6.0.1
Fixed in–
npmflatpkg:npm/flatOther threatsAffected
  • <=6.0.1
Fixed in–

Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.

Description

flat versions up to and including 6.0.1 have a resource allocation vulnerability in the unflatten() function. This flaw allows attackers to create very large sparse arrays by using unbounded numeric keys, such as a.4294967294. Exploiting this can cause operations like forEach, spread, or JSON.stringify to block the Node.js event loop, leading to denial of service.

References

Community reviews

Loading reviews…