CVE-2026-3784 Affecting curl package, versions <7.68.0-1ubuntu2.25+esm3


Severity

Recommended
low

Based on Ubuntu security rating.

Threat Intelligence

EPSS
0.01% (4th percentile)

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  • Snyk IDSNYK-UBUNTU2004-CURL-15460594
  • published11 Mar 2026
  • disclosed11 Mar 2026

Introduced: 11 Mar 2026

CVE-2026-3784  (opens in a new tab)

How to fix?

Upgrade Ubuntu:20.04 curl to version 7.68.0-1ubuntu2.25+esm3 or higher.

NVD Description

Note: Versions mentioned in the description apply only to the upstream curl package and not the curl package as distributed by Ubuntu. See How to fix? for Ubuntu:20.04 relevant fixed versions and status.

curl would wrongly reuse an existing HTTP proxy connection doing CONNECT to a server, even if the new request uses different credentials for the HTTP proxy. The proper behavior is to create or use a separate connection.

CVSS Base Scores

version 3.1