CVE-2012-0036: Curl

High severity, CVSS 7.5. EPSS: 16.1% chance of exploitation in the next 30 days.

curl and libcurl 7.2x before 7.24.0 do not properly consider special characters during extraction of a pathname from a URL, which allows remote attackers to conduct data-injection attacks via a crafted URL, as demonstrated by a CRLF injection attack on the (1) IMAP, (2) POP3, or (3) SMTP protocol.

Affected products

• Curl Curl: version 7.20.0 only; version 7.20.1 only; version 7.21.0 only; version 7.21.1 only; version 7.21.2 only; version 7.21.3 only; …
• Curl Libcurl: version 7.20.0 only; version 7.20.1 only; version 7.21.0 only; version 7.21.1 only; version 7.21.2 only; version 7.21.3 only; …

Published 2012-04-13. Last modified 2026-06-16.