CVE-2026-87864
High
Description
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.
SeverityHigh
CVSS8.1
Exploit probability—
Product
Microsoft Azl3 Curl
PublishedOct 20, 2026
First seenOct 20, 2026
Weakness typeCWE-130CWE-130
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| microsoft azl3_curl_8.11.1-11 | No range specified | — |
| microsoft azl3_curl_8.11.1-12 | No range specified | — |
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