01 Record

CVE-2026-63385

Libevent: HTTP header handling bugs create risk of access control bypass.

CriticalPUBLISHEDCNA: GitHub_M

Base score9.2 CVSS v4.0CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:N

02 Description

Libevent: HTTP header handling bugs create risk of access control bypass.

Published

2026-08-20 17:55Z1 DAY AGO

Last updated

2026-08-20 17:55Z1 DAY AGO

Reserved

2026-07-16

Assigning CNA

GitHub_M

Record state

PUBLISHED

Severity

Critical (CVSS 9.2)

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:L/SC:L/SI:L/SA:N

Weaknesses

CWE-444Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling')Base

SSVC decision

No CISA-ADP assessment

Data version

5.2

Document digest

a04370de39debc6433fb1bcafc5d863175783141af815180f49b9f15f0a1f9c7

VendorProductVersionsPlatforms

libeventlibevent>= 2.2.0-alpha, < 2.2.2-alpha, < 2.1.13—