CVE-2022-22707: Debian Linux

Medium severity, CVSS 5.9. EPSS: 8.9% chance of exploitation in the next 30 days.

In lighttpd 1.4.46 through 1.4.63, the mod_extforward_Forwarded function of the mod_extforward plugin has a stack-based buffer overflow (4 bytes representing -1), as demonstrated by remote denial of service (daemon crash) in a non-default configuration. The non-default configuration requires handling of the Forwarded header in a somewhat unusual manner. Also, a 32-bit system is much more likely to be affected than a 64-bit system.

Affected products

• Debian Debian Linux: version 10.0 only; version 11.0 only
• Lighttpd Lighttpd: from 1.4.46, up to and including 1.4.63

Published 2022-01-06. Last modified 2026-06-17.