CVE-2025-6491
BaseFortify
Publication date: 2025-07-13
Last updated on: 2025-11-04
Assigner: PHP Group
Description
Description
CVSS Scores
EPSS Scores
| Probability: | |
| Percentile: |
Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| php | php | From 8.1.0 (inc) to 8.1.33 (exc) |
| php | php | From 8.2.0 (inc) to 8.2.29 (exc) |
| php | php | From 8.3.0 (inc) to 8.3.23 (exc) |
| php | php | From 8.4.0 (inc) to 8.4.10 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-476 | The product dereferences a pointer that it expects to be valid but is NULL. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability occurs in certain PHP versions when parsing XML data in SOAP extensions. If an XML namespace prefix larger than 2GB is processed, it can cause a null pointer dereference, leading to crashes in the PHP process.
How can this vulnerability impact me? :
The vulnerability can cause the target server running affected PHP versions to crash, impacting the availability of services relying on PHP SOAP extensions.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update PHP to a version that is not affected: 8.1.33 or later, 8.2.29 or later, 8.3.23 or later, or 8.4.10 or later. Avoid processing overly large XML namespace prefixes (>2Gb) in SOAP extensions until the update is applied.