Information Exposure Through Timing Discrepancy in Apache HTTP Server - CVE-2026-33006
Published: May 4, 2026 / Updated: May 22, 2026
Vulnerability identifier: #VU129545
CSH Severity: High
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:L/VA:N/SC:H/SI:H/SA:N/E:P/U:Amber
CVE-ID: CVE-2026-33006
CWE-ID: CWE-208
Exploitation vector: Remote access
Exploit availability:
Public exploit is available
Vendor: Apache Foundation
Affected software:
Apache HTTP Server
Apache HTTP Server
Detailed vulnerability description
The vulnerability allows a remote attacker to bypass Digest authentication.
The vulnerability exists due to a timing side-channel in mod_auth_digest when processing Digest authentication. A remote attacker can perform a timing attack to bypass Digest authentication.
How to mitigate CVE-2026-33006
Install security update from vendor's website.