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Fencer Vulns
critical 9.8

CVE-2016-7398 json

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 earli…

published 2019-09-06 7 y ago modified 2026-06-17 4 mo ago also EUVD-2016-8254

cvss
9.8
version 3.1, NVD
cisa kev
Not listed
not in CISA's catalog
epss
6.8%
EPSS 6.8% chance of exploitation in 30 days, percentile 94%
public exploits
0
none known

Summary

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.

Patch / fix

  • php-pecl-http Debian 14, Debian 13, Debian 12 3.1.0+2.6.0-1

debian advisories DEBIAN-CVE-2016-7398

Exploit prediction

6.80% chance of exploitation in the next 30 days, higher than 94% of all scored CVEs (FIRST EPSS, 2026-11-08).

Exploits and checks

  • bugs.php.net https://bugs.php.net/bug.php?id=73055 referenced PoC, tagged "exploit" by a source, unverified
  • bugs.php.net https://bugs.php.net/bug.php?id=73055&edit=1 referenced PoC, tagged "exploit" by a source, unverified

CVSS scores

assigned by version score vector
NVD 3.1 9.8 CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
NVD 2.0 7.5 AV:N/AC:L/Au:N/C:P/I:P/A:P

Classification

Weakness
  • CWE-704 Incorrect Type Conversion or Cast

References

Sources

Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.