VulnerabilityDeferred

CVE-2026-22903

An unauthenticated remote attacker can send a crafted HTTP request containing an overly long SESSIONID cookie.

CRITICAL 9.8EPSS 0.68%

Does this matter?

High impact if exploited, but EPSS currently rates exploitation as unlikely (0.68%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.

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 3.1: 9.8 CRITICALCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
EPSS: 0.68% probability · 50th percentile
CISA KEV: Not listed
Weakness: CWE-121
Source: info@cert.vde.com

References

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

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.