CVE-2026-87864
IMAP APPEND plus CRLF conversion command injection
- State
- Published
- Severity
- 8.1 High
- Published
- Oct 20, 2026
- Updated
- Oct 30, 2026
- Reserved
- Sep 9, 2026
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 3.1 | 8.1 High | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H | CISA-ADP |
Weaknesses
- CWE-130 Improper Handling of Length Parameter Inconsistency
Affected Products
| Product | Versions |
|---|---|
curlcurl |
|
References
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