CVE-2020-7066: Debian Linux

Medium severity, CVSS 4.3. EPSS: 2.8% chance of exploitation in the next 30 days.

In PHP versions 7.2.x below 7.2.29, 7.3.x below 7.3.16 and 7.4.x below 7.4.4, while using get_headers() with user-supplied URL, if the URL contains zero (\0) character, the URL will be silently truncated at it. This may cause some software to make incorrect assumptions about the target of the get_headers() and possibly send some information to a wrong server.

Affected products

• Debian Debian Linux: version 8.0 only; version 9.0 only; version 10.0 only
• Opensuse Leap: version 15.1 only
• PHP PHP: from 7.2.0, before 7.2.29 (fixed in 7.2.29); from 7.3.0, before 7.3.16 (fixed in 7.3.16); from 7.4.0, before 7.4.4 (fixed in 7.4.4)
• Tenable Tenable.sc: before 5.19.0 (fixed in 5.19.0); version 5.19.0 only

Published 2020-04-01. Last modified 2026-06-17.