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CVE-2026-3784

medium CVSS 6.5 EPSS 0.5%

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.

Versions it affects

Software versions checked with the free lookup that CVE-2026-3784 applies to, and the release that fixes it where the sources name one.

curl 8.1.2 fixed in 4.0

At a glance

Severity
Medium
CVSS base score
6.5 out of 10
Known exploited
Not in CISA's catalogue of exploited vulnerabilities
EPSS
0.5% probability of exploitation in the next 30 days, higher than 39% of scored vulnerabilities
Weakness
CWE-305
Published
2026-03-11
NVD CVE.org

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