CVE-2026-87864

Not enough EPSS history yet.

Enabling `CURLOPT_CRLF` causes curl to advertise the raw input byte count in the `IMAP APPEND {N}` literal while transmitting line-ending expanded data. The server reads only $N$ bytes for the payload, causing the remaining overflow bytes to be interpreted and executed as pipelined IMAP commands within the authenticated session.

• curl.sehttps://curl.se/docs/CVE-2026-87864.html
• curl.sehttps://curl.se/docs/CVE-2026-87864.json
• hackerone.comhttps://hackerone.com/reports/3972403

No related CVEs by CWE or product.