CVE-2026-48842

What is CVE-2026-48842?

Roundcube Webmail 1.6.x before 1.6.16 and 1.7.x before 1.7.1 has Pre-authentication SQL injection in the virtuser_query plugin via a preg_replace() backslash escape bypass.

Timeline

• 2026-05-25Published to the U.S. National Vulnerability Database (NVD)
• 2026-09-25First covered in a defend.network daily briefing
• 2026-09-25NVD record last updated

Affected product

See advisory

References

• https://github.com/roundcube/roundcubemail/commit/3406183a9976e36f992d3468f37d0e2346526ee9
• https://github.com/roundcube/roundcubemail/commit/87124cc7136a48b5fa9d2b40dfead6e9dcaeaf4b
• https://github.com/roundcube/roundcubemail/releases/tag/1.6.16
• https://nvd.nist.gov/vuln/detail/CVE-2026-48842

Referenced in our briefings & reports

• GitHub Actions re-compromised; North Korea suspected in $351M Bitget heist (2026-09-26)
• Microsoft, WSO2, Adobe vulnerabilities under active exploitation; Roundcube actively abused (2026-09-25)

Related vulnerabilities

• CVE-2026-114625 – Arista VeloCloud Orchestrator (same weakness: CWE-89)
• CVE-2026-75682 – Adobe Connect (same weakness: CWE-89)
• CVE-2026-76461 – Cisco Secure Email Gateway (same weakness: CWE-89)
• CVE-2026-74820 (same weakness: CWE-89)
• CVE-2026-72898 – Metabase (same weakness: CWE-89)
• CVE-2026-58048 (same weakness: CWE-89)