CVE-2026-93682

CVE Details

Release Date:	2026-09-25
Impact:	Moderate	What is this?

Description

When the HTTP stream wrapper follows a redirect and the response carries a Location header with an empty value, the redirect code reads one byte past the end of the heap buffer holding the location. The value of that out-of-bounds byte decides which redirect target is built, so a malicious server controls whether the client is sent to the host root or to the current directory.

See more information about CVE-2026-93682 from MITRE CVE dictionary and NIST NVD

NOTE: The following CVSS metrics and score provided are preliminary and subject to review.

CVSS v3 metrics

Base Score:	5.8
Vector String:	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
Version:	3.1
Attack Vector:	Network
Attack Complexity:	Low
Privileges Required:	None
User Interaction:	None
Scope:	Changed
Confidentiality Impact:	Low
Integrity Impact:	None
Availability Impact:	None

Errata information

Platform	Errata	Release Date
Oracle Linux version 8 (libzip)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php-pear)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php-pecl-apcu)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php-pecl-rrd)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php-pecl-xdebug)	ELSA-2026-87080	2026-10-21
Oracle Linux version 8 (php-pecl-zip)	ELSA-2026-87080	2026-10-21