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CVE-2026-87864 Details
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.
Metrics
CVSS 4.0 Severity and Vector Strings:
No CVSS 4.0 data is available for this CVE.
CVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
CISA-ADP
Assessed Oct 30, 2026Exploitation: PocAutomatable: NoTechnical Impact: Total
References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://hackerone.com/reports/3972403 | CISA-ADP | |
| https://curl.se/docs/CVE-2026-87864.html | curl | |
| https://curl.se/docs/CVE-2026-87864.json | curl | |
| https://hackerone.com/reports/3972403 | curl |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-130 | Improper Handling of Length Parameter Inconsistency | CISA-ADP |
Affected Products
No affected product data is available for this CVE.
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Oct 30, 2026 | CVE Modified | CISA-ADP |
| Oct 20, 2026 | New CVE Received | curl |