CVE-2026-93682
published 2026-09-25CVE-2026-93682: 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…
PriorityP432medium5.8CVSS 3.1
AVNACLPRNUINSCCLINAN
EPSS
0.34%
26.7th percentile
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.
Affected
21 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| debian | php8.4 | — | — |
| php | php | — | — |
| php | php | >= 8.2.0 < 8.2.34 | 8.2.34 |
| php | php | >= 8.3.0 < 8.3.35 | 8.3.35 |
| php | php | >= 8.4.0 < 8.4.26 | 8.4.26 |
| php | php | >= 8.5.0 < 8.5.11 | 8.5.11 |
| php_7.4 | php | — | — |
| php_8.2 | php | — | — |
| php_8.3 | php | — | — |
| php_8.4 | php | — | — |
| php_group | php | >= 8.2.* < 8.2.34 | 8.2.34 |
| php_group | php | >= 8.3.* < 8.3.35 | 8.3.35 |
| php_group | php | >= 8.4.* < 8.4.26 | 8.4.26 |
| php_group | php | >= 8.5.* < 8.5.11 | 8.5.11 |
| ubuntu | php5 | — | — |
| ubuntu | php7.0 | — | — |
| ubuntu | php7.2 | — | — |
| ubuntu | php7.4 | — | — |
| ubuntu | php8.1 | — | — |
| ubuntu | php8.3 | — | — |
| ubuntu | php8.5 | — | — |
CVSS provenance
nvdv3.15.8MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:N/A:N
vendor_redhat5.8MEDIUM
vendor_ubuntu3.4LOW
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Ubuntu
PHP vulnerabilities
vendor_ubuntu·2026-10-19·CVSS 3.4
CVE-2026-93682 [LOW] PHP vulnerabilities
Title: PHP vulnerabilities
Summary: Several security issues were fixed in PHP.
It was discovered that PHP did not properly validate the size of MySQL
server packets in the mysqlnd driver. A malicious server could possibly use
this issue to cause PHP to crash, resulting in a denial of service. This
issue was only addressed in Ubuntu 20.04 LTS, Ubuntu 22.04 LTS, Ubuntu
24.04 LTS, Ubuntu 26.04 LTS, and Ubuntu 26.10. (CVE-2025-1218)
It was discovered that PHP incorrectly handled response buffer sizes in the
SOAP HTTP client. A malicious server could possibly use this issue to cause
PHP to crash, resulting in a denial of service, or execute arbitrary code.
(CVE-2025-14181)
It was discovered that PHP incorrectly handled certain TAR archive headers
in the Phar extension. An attacker could pos
Red Hat
php: php: Out-of-bounds read via empty HTTP redirect Location header
vendor_redhat·2026-09-25·CVSS 5.8
CVE-2026-93682 [MEDIUM] CWE-125 php: php: Out-of-bounds read via empty HTTP redirect Location header
php: php: Out-of-bounds read via empty HTTP redirect Location header
A flaw was found in PHP. When the HTTP stream wrapper processes a redirect response containing an empty Location header, an out-of-bounds read occurs by accessing memory beyond the allocated buffer. A malicious server can exploit this flaw to influence the client's redirect target path, potentially routing subsequent requests to unintended locations based on adjacent heap memory.
Package: php (Red Hat Enterprise Linux 10) - Fix deferred
Package: php8.4 (Red Hat Enterprise Linux 10) - Fix deferred
Package: php (Red Hat Enterprise Linux 6) - Out of support scope
Package: php (Red Hat Enterprise Linux 7) - Fix deferred
Package: php:7.4/php (Red Hat Enterprise Linux 8) - Fix deferred
Package: php:8.2/php (Red Hat Enter
VulDB
PHP up to 8.2.33/8.3.34/8.4.25/8.5.10 HTTP Stream Wrapper out-of-bounds
vuldb·2026-09-25·CVSS 5.8
CVE-2026-93682 [MEDIUM] PHP up to 8.2.33/8.3.34/8.4.25/8.5.10 HTTP Stream Wrapper out-of-bounds
A vulnerability classified as problematic was found in PHP up to 8.2.33/8.3.34/8.4.25/8.5.10. This impacts an unknown function of the component HTTP Stream Wrapper. Executing a manipulation can lead to out-of-bounds read.
This vulnerability is tracked as CVE-2026-93682. The attack can be launched remotely. No exploit exists.
Upgrading the affected component is advised.
No detection rules found.
No public exploits indexed.
2026-09-25
Published