CURL-CVE-2026-87864

vendorUSosv

IMAP APPEND plus CRLF conversion command injection

view advisory published 2026-10-14Licence: per source

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.

01

describes (1)

Related CVEs.

IDseverity exploitable
CVE-2026-87864US——
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 $N$ b…
scry

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