CVE-2026-4873
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.
- Published May 13, 2026
- CVSS 5.9 medium
- 0.4% chance of exploitation in the next 30 days (EPSS)
- Public exploit code is available
- A fix is available
Affected software
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