CVSS 3.1 Score 4.3 of 10 (medium)


Published Aug 2, 2023
Updated: Jan 12, 2024


CVE-2023-26430 is a vulnerability that affects the products r_8QfP, r_8QfS, and tz2RII. Attackers with access to user accounts can inject arbitrary control characters to SIEVE mail-filter rules, potentially gaining unauthorized access or disrupting filter processing. The vulnerability has a risk score of 5 and a base severity of MEDIUM. Remediation involves the addition of sanitization to mail-filter APIs to prevent the forwarding of control characters. While no publicly available exploits are known, organizations should still be cautious as this vulnerability could pose a potential threat to their systems and data.

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