Apache Apache HTTP Server
144 CVEs affecting Apache Apache HTTP Server. Latest disclosed: 2026-10-01. Critical: 29, High: 78.
| CVE | Severity | Score | Published | Summary |
|---|---|---|---|---|
CVE-2026-59797 | Critical | 9.8 | 2026-10-01 | Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related expressions. This issue affects Apache HTTP Serv… |
CVE-2026-57941 | Critical | 9.8 | 2026-10-01 | Use After Free vulnerability in Apache HTTP Server's mod_http2 via shared session->bbtmp re-entrancy This issue affects Apache HTTP Server: from 2.4.0 throu… |
CVE-2026-56154 | Critical | 9.8 | 2026-10-01 | Use After Free vulnerability in Apache HTTP Server's mod_rewrite when using lookahead (%{LA-U:HTTP:...}) This issue affects Apache HTTP Server: from 2.4.0 t… |
CVE-2026-44631 | Critical | 9.8 | 2026-06-08 | Buffer Underwrite vulnerability in Apache HTTP Server on crafted regular expressions in the configuration. This issue affects Apache HTTP Server: from 2.4.0 t… |
CVE-2026-29167 | Critical | 9.8 | 2026-06-08 | Use After Free vulnerability in Apache HTTP Server with mod_ldap in per-directory configuration This issue affects Apache HTTP Server: from 2.4.0 through 2.4… |
CVE-2026-28780 | Critical | 9.8 | 2026-05-05 | Heap-based Buffer Overflow vulnerability in mod_proxy_ajp of Apache HTTP Server. If mod_proxy_ajp connects to a malicious AJP server this AJP server can send a… |
CVE-2024-38476 | Critical | 9.8 | 2024-07-01 | Vulnerability in core of Apache HTTP Server 2.4.59 and earlier are vulnerably to information disclosure, SSRF or local script execution via backend application… |
CVE-2024-38474 | Critical | 9.8 | 2024-07-01 | Substitution encoding issue in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows attacker to execute scripts in directories permitted by the configur… |
CVE-2023-25690 | Critical | 9.8 | 2023-03-07 | Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack. Configurations are affected when m… |
CVE-2022-31813 | Critical | 9.8 | 2022-06-09 | Apache HTTP Server 2.4.53 and earlier may not send the X-Forwarded-* headers to the origin server based on client side Connection header hop-by-hop mechanism… |
CVE-2022-23943 | Critical | 9.8 | 2022-03-14 | Out-of-bounds Write vulnerability in mod_sed of Apache HTTP Server allows an attacker to overwrite heap memory with possibly attacker provided data. This issue… |
CVE-2022-22720 | Critical | 9.8 | 2022-03-14 | 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 Re… |
CVE-2021-44790 | Critical | 9.8 | 2021-12-20 | A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts). The Apache httpd team is… |
CVE-2021-42013 | Critical | 9.8 | 2021-10-07 | It was found that the fix for CVE-2021-41773 in Apache HTTP Server 2.4.50 was insufficient. An attacker could use a path traversal attack to map URLs to files… |
CVE-2021-41773 | Critical | 9.8 | 2021-10-05 | A flaw was found in a change made to path normalization in Apache HTTP Server 2.4.49. An attacker could use a path traversal attack to map URLs to files outsid… |
CVE-2021-39275 | Critical | 9.8 | 2021-09-16 | ap_escape_quotes() may write beyond the end of a buffer when given malicious input. No included modules pass untrusted data to these functions, but third-party… |
CVE-2021-26691 | Critical | 9.8 | 2021-06-10 | In Apache HTTP Server versions 2.4.0 to 2.4.46 a specially crafted SessionHeader sent by an origin server could cause a heap overflow |
CVE-2018-1312 | Critical | 9.8 | 2018-03-26 | In Apache httpd 2.2.0 to 2.4.29, when generating an HTTP Digest authentication challenge, the nonce sent to prevent reply attacks was not correctly generated u… |
CVE-2017-7679 | Critical | 9.8 | 2017-06-20 | In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_mime can read one byte past the end of a buffer when sending a malicious Content-Type response… |
CVE-2017-3169 | Critical | 9.8 | 2017-06-20 | In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, mod_ssl may dereference a NULL pointer when third-party modules call ap_hook_process_connection()… |