VDB-362482 · CVE-2026-7259 · GHSA-wm6j-2649-pv75

PHP up to 8.2.30/8.3.30/8.4.20/8.5.5 mb_regex_encoding null pointer dereference

CVSS Meta Temp Score CVSS is a standardized scoring system to determine possibilities of attacks. The Temp Score considers temporal factors like disclosure, exploit and countermeasures. The unique Meta Score calculates the average score of different sources to provide a normalized scoring system.	Current Exploit Price (≈) Our analysts are monitoring exploit markets and are in contact with vulnerability brokers. The range indicates the observed or calculated exploit price to be seen on exploit markets. A good indicator to understand the monetary effort required for and the popularity of an attack.	CTI Interest Score Our Cyber Threat Intelligence team is monitoring different web sites, mailing lists, exploit markets and social media networks. The CTI Interest Score identifies the interest of attackers and the security community for this specific vulnerability in real-time. A high score indicates an elevated risk to be targeted for this vulnerability.
3.6	$0-$5k	0.00

Summaryinfo

A vulnerability categorized as problematic has been discovered in PHP up to 8.2.30/8.3.30/8.4.20/8.5.5. Affected is the function mb_regex_encoding. Executing a manipulation can lead to null pointer dereference. This vulnerability is tracked as CVE-2026-7259. The attack can be launched remotely. No exploit exists. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in PHP up to 8.2.30/8.3.30/8.4.20/8.5.5. It has been declared as problematic. This vulnerability affects the function mb_regex_encoding. The manipulation with an unknown input leads to a null pointer dereference vulnerability. The CWE definition for the vulnerability is CWE-476. A NULL pointer dereference occurs when the application dereferences a pointer that it expects to be valid, but is NULL, typically causing a crash or exit. As an impact it is known to affect availability. CVE summarizes:

In PHP versions 8.2.* before 8.2.31, 8.3.* before 8.3.31, 8.4.* before 8.4.21, and 8.5.* before 8.5.6, a mismatch between encoding lists in Oniguruma and mbfl leads to a NULL pointer dereference, resulting in a segmentation fault and denial of service. The vulnerability is exploitable when user-controlled input can influence the encoding passed to mb_regex_encoding().

The advisory is available at github.com. This vulnerability was named CVE-2026-7259 since 04/28/2026. The exploitation appears to be difficult. The attack can be initiated remotely. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

The vulnerability scanner Nessus provides a plugin with the ID 313734 (Fedora 44 : php (2026-c66eaae759)), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 8.2.31, 8.3.31, 8.4.21 or 8.5.6 eliminates this vulnerability.

The vulnerability is also documented in the databases at Tenable (313734) and CERT Bund (WID-SEC-2026-1433). If you want to get best quality of vulnerability data, you may have to visit VulDB.

Affected

Debian Linux
Amazon Linux 2
Red Hat Enterprise Linux
Fedora Linux
Ubuntu Linux
SUSE Linux
Oracle Linux
SUSE openSUSE
RESF Rocky Linux
Microsoft Azure Linux
Open Source PHP
Zend ZendPHP
cPanel cPanel/WHM

Productinfo

Type

Programming Language Software

Name

Version

License

open-source

Website

Product: https://www.php.org/

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 3.7
VulDB Meta Temp Score: 3.6

VulDB Base Score: 3.7
VulDB Temp Score: 3.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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Vector	Complexity	Authentication	Confidentiality	Integrity	Availability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Null pointer dereference
CWE: CWE-476 / CWE-404
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined

EPSS Score: 🔒
EPSS Percentile: 🔒

Price Prediction: 🔍
Current Price Estimation: 🔒

0-Day	Unlock	Unlock	Unlock	Unlock
Today	Unlock	Unlock	Unlock	Unlock

Nessus ID: 313734
Nessus Name: Fedora 44 : php (2026-c66eaae759)

Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: PHP 8.2.31/8.3.31/8.4.21/8.5.6

Timelineinfo

04/28/2026 CVE reserved
05/10/2026 +12 days Advisory disclosed
05/10/2026 +0 days VulDB entry created
07/03/2026 +54 days VulDB entry last update

Sourcesinfo

Product: php.org

Advisory: GHSA-wm6j-2649-pv75
Status: Confirmed

CVE: CVE-2026-7259 (🔒)
GCVE (CVE): GCVE-0-2026-7259
GCVE (VulDB): GCVE-100-362482
CERT Bund: WID-SEC-2026-1433 - PHP: Mehrere Schwachstellen

Entryinfo

Created: 05/10/2026 08:59
Updated: 07/03/2026 16:34
Changes: 05/10/2026 08:59 (70), 05/10/2026 10:42 (7), 05/11/2026 10:56 (2), 06/02/2026 01:25 (1), 06/04/2026 09:19 (1), 07/03/2026 16:34 (1)
Complete: 🔍
Cache ID: 216::103

If you want to get best quality of vulnerability data, you may have to visit VulDB.