ZeroHour

CVE-2026-4873

PoC
CVSS 3.1
5.9 medium
EPSS
<1%p26
Published
()
Modified
Description

A vulnerability exists where a connection requiring TLS incorrectly reuses an existing unencrypted connection from the same connection pool. If an initial transfer is made in clear-text (via IMAP, SMTP, or POP3), a subsequent request to that same host bypasses the TLS requirement and instead transmit data unencrypted.

Vendors
haxx
Products
curl
Weakness
CWE-319, CWE-295
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

In the news

No ingested article mentions this CVE yet.