AUGUST 4, 2026
Live Feed
Return to register
Case File

CVE-2018-16840

CRITICAL · CVSS 9.8 EPSS 3.40% Public Exploit

Source: NVD + CISA KEV + EPSS (historical backfill) · Published 2018-10-31 · Last synced 2026-08-04

Field Assessment

AI analysis pending.

Exhibit — Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2018-16840
Severity
CRITICAL
CVSS
9.8
EPSS
3.40%

Original Filing — NVD Description

A heap use-after-free flaw was found in curl versions from 7.59.0 through 7.61.1 in the code related to closing an easy handle. When closing and cleaning up an 'easy' handle in the `Curl_close()` function, the library code first frees a struct (without nulling the pointer) and might then subsequently erroneously write to a struct field within that already freed struct.