CVE-2003-0593: Opera allows remote attackers to bypass intended cookie access restrictions on a web application via "%2e%2...

Security readout for executives and security teams

This old Opera browser issue could let a website receive cookies that were meant to stay limited to another URL path on the same server. Business risk depends on whether legacy Opera clients and path-scoped cookie isolation still matter in your environment. Likely exposure is limited to environments where affected Opera versions are still used and applications rely on cookie Path restrictions for isolation between apps on the same host. The source bundle does not identify affected versions or modern product status. Treat as low near-term urgency unless legacy Opera or same-host path-based application isolation exists. Prioritize inventory confirmation over emergency response because the bundle lacks active exploitation, CVSS, affected versions, or patch details. Mitigation focus: Check Opera or vendor guidance for affected versions and fixes.; Remove or upgrade legacy Opera browsers from managed environments.; Avoid relying on cookie Path alone for security isolation..

Prepared

Jun 30, 2026, 06:56 UTC (UTC+00:00)

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.