CVE-2026-22903

Stack Overflow via SESSIONID Cookie in lighttpd

State: Published
Severity: 9.8 Critical
Published: Feb 9, 2026
Updated: Feb 9, 2026
Reserved: Jan 13, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	9.8 Critical	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H	CERTVDE

Weaknesses

CWE-121 Stack-based Buffer Overflow

Affected Products

Product	Versions
0852-1322WAGO	0.0.0 through 2.64Affected
0852-1328WAGO	0.0.0 through 2.64Affected
0852-1322WAGO	2.64Affected
0852-1328WAGO	2.64Affected

References

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

Every record here comes from the CVE Program’s CVE List. © 1999–2026 The MITRE Corporation. CVE is a registered trademark of The MITRE Corporation. The records are reproduced under the CVE Program terms of use.