CURL-CVE-2026-4873

vendorUSosv

connection reuse ignores TLS requirement

view advisory published 2026-04-29Licence: per source

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.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-4873US—OT elevated—
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…
scry

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