CVE-2009-0153: Apple Mac OS X

Medium severity, CVSS 4.3. EPSS: 3.7% chance of exploitation in the next 30 days.

International Components for Unicode (ICU) 4.0, 3.6, and other 3.x versions, as used in Apple Mac OS X 10.5 before 10.5.7, iPhone OS 1.0 through 2.2.1, iPhone OS for iPod touch 1.1 through 2.2.1, Fedora 9 and 10, and possibly other operating systems, does not properly handle invalid byte sequences during Unicode conversion, which might allow remote attackers to conduct cross-site scripting (XSS) attacks.

Affected products

• Apple Mac OS X: version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; version 10.5.5 only; …
• Apple Mac OS X Server: version 10.5.0 only; version 10.5.1 only; version 10.5.2 only; version 10.5.3 only; version 10.5.4 only; version 10.5.5 only; …

Published 2009-05-13. Last modified 2026-06-16.