CVE-2026-22903 — CRITICAL (9.8)

Vulnerability 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.

CVSS Score

9.8

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

NONE

Scope

UNCHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-121

References

https://certvde.com/de/advisories/VDE-2026-004

FAQ

What is CVE-2026-22903?

CVE-2026-22903 is a vulnerability with a CVSS score of 9.8 (CRITICAL). 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 c...

How severe is CVE-2026-22903?

CVE-2026-22903 has been rated CRITICAL with a CVSS base score of 9.8/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-22903?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.