curl: CRLF injection in libcurl’s SMTP client via –mail-from and –mail-rcpt allows SMTP command smuggling

Security Update News

Update Information

Title curl: CRLF injection in libcurl’s SMTP client via –mail-from and –mail-rcpt allows SMTP command smuggling
Update ID H1:3235428
Type hackerone
Published 2025-07-03T05:49:06
Last Updated 2025-07-03T22:57:44

Security Impact

Severity NONE

AI Analysis

AI Description A vulnerability in libcurl’s SMTP client allows CRLF injection via the –mail-from and –mail-rcpt options, enabling SMTP command smuggling. This could allow attackers to inject malicious commands into the SMTP stream, potentially leading to unauthorized email sending or interference with email communications. The issue is related to improper handling of CRLF sequences in the affected options.
AI Severity High
AI Vendor curl project
AI Product libcurl
AI Version various versions

Update Details

Vulnerability description not provided

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