What’s Vulnerable › Vulnerabilities

CVE-2022-22720: HTTP request smuggling vulnerability in Apache HTTP Server 2.4.52 and earlier

• Severity: critical (CVSS 9.8 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 28.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2022-03-14 · updated 2026-06-17
• Weakness: CWE-444

Description

Apache HTTP Server 2.4.52 and earlier fails to close inbound connection when errors are encountered discarding the request body, exposing the server to HTTP Request Smuggling

Affected products

• Apache HTTP Server: through 2.4.52
• macOS: 10.15.7-security_update_2020-001, 10.15.7-security_update_2021-001, 10.15.7-security_update_2021-002, 10.15.7-security_update_2021-003, 10.15.7-security_update_2021-004, 10.15.7-security_update_2021-005 (+6)
• Apple macOS: before 10.15.7; from 11.0 before 11.6.6; from 12.0 through 12.4 — fixed in 10.15.7, 11.6.6
• Debian Linux: 9.0
• Fedoraproject Fedora: 34, 35, 36
• Oracle Corporation Enterprise Manager Ops Center: 12.4.0.0
• Oracle Corporation Oracle HTTP Server: 12.2.1.3.0, 12.2.1.4.0
• Oracle Corporation Oracle ZFS Storage Appliance Kit: 8.8

How to fix

Upgrade to a fixed version: Apple macOS 10.15.7, 11.6.6. Check the vendor advisory for mitigations.

References

• http://seclists.org/fulldisclosure/2022/May/33
• http://seclists.org/fulldisclosure/2022/May/35
• http://seclists.org/fulldisclosure/2022/May/38
• http://www.openwall.com/lists/oss-security/2022/03/14/3
• https://httpd.apache.org/security/vulnerabilities_24.html
• https://lists.debian.org/debian-lts-announce/2022/03/msg00033.html
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/RGWILBORT67SHMSLYSQZG2NMXGCMPUZO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/X73C35MMMZGBVPQQCH7LQZUMYZNQA5FO/
• https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/Z7H26WJ6TPKNWV3QKY4BHKUKQVUTZJTD/
• https://security.gentoo.org/glsa/202208-20
• https://security.netapp.com/advisory/ntap-20220321-0001/
• https://support.apple.com/kb/HT213255

Get alerted when CVE-2022-22720 or the next vulnerability affects your stack