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Vulnerability record · CVE-2020-7070 · published 2 October 2020

CVE-2020-7070: Php improper input validation vulnerability

Php · Php

In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.

5.3 CVSS 3.1 Medium EPSS 5.0% · top 8.0% CWE-20 · Improper input validationCWE-565 · Reliance on cookies without validation
5.3CVSS 3.1 base score, v2 5.0
5.0%EPSS exploitation probability, 30 days
NoNot in CISA KEV
7Affected product versions listed by NVD
30References, 2 tagged exploit
17 Jun 2026Last modified by NVD

Description

In PHP versions 7.2.x below 7.2.34, 7.3.x below 7.3.23 and 7.4.x below 7.4.11, when PHP is processing incoming HTTP cookie values, the cookie names are url-decoded. This may lead to cookies with prefixes like __Host confused with cookies that decode to such prefix, thus leading to an attacker being able to forge cookie which is supposed to be secure. See also CVE-2020-8184 for more information.

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

Affected products

7 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://cve.circl.lu/cve/CVE-2020-8184 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00045.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00067.html Mailing ListThird Party Advisory
https://bugs.php.net/bug.php?id=79699 Issue TrackingVendor Advisory
https://hackerone.com/reports/895727 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00008.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EVDN7D3IB4EAI4D3ZOM2OJ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2J3ZZDHCSX65T5QWV4AHBN
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRU57N3OSYZPOMFWPRDNVH7
https://security.gentoo.org/glsa/202012-16 Third Party Advisory
https://security.netapp.com/advisory/ntap-20201016-0001/ Third Party Advisory
https://usn.ubuntu.com/4583-1/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4856 Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Not ApplicableThird Party Advisory
https://www.tenable.com/security/tns-2021-14 Third Party Advisory
http://cve.circl.lu/cve/CVE-2020-8184 Third Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00045.html Mailing ListThird Party Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00067.html Mailing ListThird Party Advisory
https://bugs.php.net/bug.php?id=79699 Issue TrackingVendor Advisory
https://hackerone.com/reports/895727 ExploitThird Party Advisory
https://lists.debian.org/debian-lts-announce/2020/10/msg00008.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7EVDN7D3IB4EAI4D3ZOM2OJ
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/P2J3ZZDHCSX65T5QWV4AHBN
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RRU57N3OSYZPOMFWPRDNVH7
https://security.gentoo.org/glsa/202012-16 Third Party Advisory
https://security.netapp.com/advisory/ntap-20201016-0001/ Third Party Advisory
https://usn.ubuntu.com/4583-1/ Third Party Advisory
https://www.debian.org/security/2021/dsa-4856 Third Party Advisory
https://www.oracle.com/security-alerts/cpuoct2021.html Not ApplicableThird Party Advisory
https://www.tenable.com/security/tns-2021-14 Third Party Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-7070), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.