What’s Vulnerable › Vulnerabilities

CVE-2016-7126

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 8.8% probability of exploitation in the next 30 days
• Public exploit or detection template: yes
• Published: 2016-09-12 · updated 2026-06-17
• Weakness: CWE-787

Description

The imagetruecolortopalette function in ext/gd/gd.c in PHP before 5.6.25 and 7.x before 7.0.10 does not properly validate the number of colors, which allows remote attackers to cause a denial of service (select_colors allocation error and out-of-bounds write) or possibly have unspecified other impact via a large value in the third argument.

Affected products

• PHP: through 5.6.24; 7.0.0, 7.0.1, 7.0.2, 7.0.3, 7.0.4, 7.0.5 (+4)

References

• http://openwall.com/lists/oss-security/2016/09/02/9
• http://rhn.redhat.com/errata/RHSA-2016-2750.html
• http://www.php.net/ChangeLog-5.php
• http://www.php.net/ChangeLog-7.php
• http://www.securityfocus.com/bid/92755
• http://www.securitytracker.com/id/1036680
• https://bugs.php.net/bug.php?id=72697
• https://github.com/php/php-src/commit/28022c9b1fd937436ab67bb3d61f652c108baf96
• https://github.com/php/php-src/commit/b6f13a5ef9d6280cf984826a5de012a32c396cd4?w=1
• https://security.gentoo.org/glsa/201611-22
• https://www.tenable.com/security/tns-2016-19
• http://openwall.com/lists/oss-security/2016/09/02/9

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