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CVE-2026-22903 – Stack Overflow via SESSIONID Cookie in lighttpd

Posted on February 9, 2026
CVE ID : CVE-2026-22903

Published : Feb. 9, 2026, 8:16 a.m. | 1 hour, 43 minutes ago

Description : An unauthenticated remote attacker can send a crafted HTTP request containing an overly long SESSIONID cookie. This can trigger a stack buffer overflow in the modified lighttpd server, causing it to crash and potentially enabling remote code execution due to missing stack protections.

Severity: 9.8 | CRITICAL

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Solution

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