CVE-2016-7398

Name: CVE-2016-7398
Creator: NVD / NIST
Published: 2019-09-06T19:15:11.387+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

CRITICALCVSS 9.8/10EPSS 6.80%

Last modified Jun 17, 2026

CVE-2016-7398 is a critical-severity vulnerability rated 9.8/10 on the CVSS scale. A type confusion vulnerability in the merge_param() function of php_http_params.c in PHP's pecl-http extension 3.1.0beta2 (PHP 7) and earlier as well as 2.6.0beta2 (PHP 5) and earlier allows attackers to crash PHP and possibly execute arbitrary code via crafted HTTP requests.. EPSS estimates a 6.80% chance of exploitation in the next 30 days.

Description

A type confusion vulnerability in the merge_param() function of php_http_params.c in PHP's pecl-http extension 3.1.0beta2 (PHP 7) and earlier as well as 2.6.0beta2 (PHP 5) and earlier allows attackers to crash PHP and possibly execute arbitrary code via crafted HTTP requests.

Metrics

CVSS 3.1

9.8/10

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS Probability

6.80%

93.2th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-704

Affected Software

Vendor	Product	Versions
Php	Ext-Http	<= 2.5.6
Php	Ext-Http	>= 3.0.0, <= 3.0.1
Php	Ext-Http	2.6.0
Php	Ext-Http	3.1.0

References

https://bugs.php.net/bug.php?id=73055Exploit, Mailing List, Vendor Advisory
https://bugs.php.net/bug.php?id=73055&edit=1Exploit, Vendor Advisory
https://github.com/m6w6/ext-http/commit/17137d4ab1ce81a2cee0fae842340a344ef3da83Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00022.html
https://bugs.php.net/bug.php?id=73055Exploit, Mailing List, Vendor Advisory
https://bugs.php.net/bug.php?id=73055&edit=1Exploit, Vendor Advisory
https://github.com/m6w6/ext-http/commit/17137d4ab1ce81a2cee0fae842340a344ef3da83Patch, Third Party Advisory
https://lists.debian.org/debian-lts-announce/2019/09/msg00022.html

Timeline

Published: Sep 6, 2019
Last Modified: Jun 17, 2026
Status: Modified

Frequently Asked Questions

What is CVE-2016-7398?

How severe is CVE-2016-7398?

CVE-2016-7398 has a CVSS score of 9.8/10 (CRITICAL severity). The EPSS model estimates a 6.80% probability of exploitation in the next 30 days.

How do I fix CVE-2016-7398?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2016-7398?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST