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.
Published: 2026-09-25
Score: 5.8 Medium
EPSS: n/a
KEV: No
Impact: n/a
Action: n/a
AI Analysis

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Remediation

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Tracking

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Advisories
Source ID Title
Debian DSA Debian DSA DSA-6514-1 php8.4 security update
History

Fri, 25 Sep 2026 20:15:00 +0000

Type Values Removed Values Added
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.
Title Out-of-bounds read in the HTTP stream wrapper when following a redirect with an empty Location header
Weaknesses CWE-125
References
Metrics cvssV3_1

{'score': 5.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N'}


Subscriptions

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cve-icon MITRE

Status: PUBLISHED

Assigner: php

Published:

Updated: 2026-09-25T20:38:14.346Z

Reserved: 2026-09-18T14:18:02.748Z

Link: CVE-2026-93682

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-09-25T20:17:47.597

Modified: 2026-09-25T20:17:47.597

Link: CVE-2026-93682

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses