A flaw was found in curl. When curl is configured to perform carriage return and line feed (CRLF) conversion during an Internet Message Access Protocol (IMAP) append operation, it incorrectly reports the raw input size rather than the expanded byte count. Because the receiving server only reads the advertised length as message data, it interprets the remaining overflow bytes as subsequent commands. An attacker capable of supplying message data with line breaks can exploit this issue to execute unauthorized IMAP commands within an authenticated session.
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Advisories
| Source | ID | Title |
|---|---|---|
 Ubuntu USN |
USN-8927-1 | curl vulnerabilities |
| Ubuntu USN |
USN-8932-1 | curl vulnerabilities |
Fixes
Solution
No solution given by the vendor.
Workaround
No workaround given by the vendor.
References
History
Sat, 17 Oct 2026 00:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | A flaw was found in curl. When curl is configured to perform carriage return and line feed (CRLF) conversion during an Internet Message Access Protocol (IMAP) append operation, it incorrectly reports the raw input size rather than the expanded byte count. Because the receiving server only reads the advertised length as message data, it interprets the remaining overflow bytes as subsequent commands. An attacker capable of supplying message data with line breaks can exploit this issue to execute unauthorized IMAP commands within an authenticated session. | |
| Title | curl: IMAP APPEND plus CRLF conversion command injection | |
| Weaknesses | CWE-130 | |
| References |
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| Metrics |
threat_severity
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cvssV3_1
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Projects
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MITRE
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Redhat
OpenCVE Enrichment
Updated: 2026-10-17T02:00:07Z
Weaknesses