Wget Vulnerabilities in Ubuntu Lead to Denial of Service Risks

A regression introduced by USN-8543-1 in Wget has been addressed in USN-8543-2. The update for CVE-2026-58472 was incomplete, potentially allowing remote attackers to exploit vulnerabilities. Affected systems include Ubuntu 14.04 LTS, 18.04 LTS, 20.04 LTS, 22.04 LTS, 24.04 LTS, and 26.04 LTS. Specific vulnerabilities include mishandling of semicolons in URLs (CVE-2024-38428) and whitespace-only URLs leading to denial of service (CVE-2026-58469). Additional issues include integer overflow (CVE-2026-58470) and character set conversion problems (CVE-2026-58471). Users are advised to update their systems to mitigate these risks. The vulnerabilities could allow attackers to trick users or cause service disruptions.

Key Points: • USN-8543-1 introduced a regression in Wget affecting multiple Ubuntu versions. • Critical vulnerabilities include denial of service risks and potential remote code execution. • Users are urged to update to the latest package versions to secure their systems.