Total
306 CVE
| CVE | Vendors | Products | Updated | CVSS v2 | CVSS v3 |
|---|---|---|---|---|---|
| CVE-2021-40438 | 11 Apache, Broadcom, Debian and 8 more | 40 Http Server, Brocade Fabric Operating System Firmware, Debian Linux and 37 more | 2025-05-16 | 6.8 MEDIUM | 9.0 CRITICAL |
| A crafted request uri-path can cause mod_proxy to forward the request to an origin server choosen by the remote user. This issue affects Apache HTTP Server 2.4.48 and earlier. | |||||
| CVE-2025-3891 | 3 Apache, Debian, Redhat | 3 Http Server, Debian Linux, Enterprise Linux | 2025-05-12 | N/A | 5.3 MEDIUM |
| A flaw was found in the mod_auth_openidc module for Apache httpd. This flaw allows a remote, unauthenticated attacker to trigger a denial of service by sending an empty POST request when the OIDCPreservePost directive is enabled. The server crashes consistently, affecting availability. | |||||
| CVE-2024-38475 | 2 Apache, Netapp | 2 Http Server, Ontap 9 | 2025-05-02 | N/A | 9.1 CRITICAL |
| Improper escaping of output in mod_rewrite in Apache HTTP Server 2.4.59 and earlier allows an attacker to map URLs to filesystem locations that are permitted to be served by the server but are not intentionally/directly reachable by any URL, resulting in code execution or source code disclosure. Substitutions in server context that use a backreferences or variables as the first segment of the substitution are affected. Some unsafe RewiteRules will be broken by this change and the rewrite flag "UnsafePrefixStat" can be used to opt back in once ensuring the substitution is appropriately constrained. | |||||
| CVE-2020-11993 | 7 Apache, Canonical, Debian and 4 more | 13 Http Server, Ubuntu Linux, Debian Linux and 10 more | 2025-05-01 | 4.3 MEDIUM | 7.5 HIGH |
| Apache HTTP Server versions 2.4.20 to 2.4.43 When trace/debug was enabled for the HTTP/2 module and on certain traffic edge patterns, logging statements were made on the wrong connection, causing concurrent use of memory pools. Configuring the LogLevel of mod_http2 above "info" will mitigate this vulnerability for unpatched servers. | |||||
| CVE-2021-33193 | 5 Apache, Debian, Fedoraproject and 2 more | 6 Http Server, Debian Linux, Fedora and 3 more | 2025-05-01 | 5.0 MEDIUM | 7.5 HIGH |
| A crafted method sent through HTTP/2 will bypass validation and be forwarded by mod_proxy, which can lead to request splitting or cache poisoning. This issue affects Apache HTTP Server 2.4.17 to 2.4.48. | |||||
| CVE-2021-36160 | 6 Apache, Broadcom, Debian and 3 more | 13 Http Server, Brocade Fabric Operating System Firmware, Debian Linux and 10 more | 2025-05-01 | 5.0 MEDIUM | 7.5 HIGH |
| A carefully crafted request uri-path can cause mod_proxy_uwsgi to read above the allocated memory and crash (DoS). This issue affects Apache HTTP Server versions 2.4.30 to 2.4.48 (inclusive). | |||||
| CVE-2021-39275 | 6 Apache, Debian, Fedoraproject and 3 more | 11 Http Server, Debian Linux, Fedora and 8 more | 2025-05-01 | 7.5 HIGH | 9.8 CRITICAL |
| 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 / external modules may. This issue affects Apache HTTP Server 2.4.48 and earlier. | |||||
| CVE-2021-44790 | 7 Apache, Apple, Debian and 4 more | 14 Http Server, Mac Os X, Macos and 11 more | 2025-05-01 | 7.5 HIGH | 9.8 CRITICAL |
| 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 not aware of an exploit for the vulnerabilty though it might be possible to craft one. This issue affects Apache HTTP Server 2.4.51 and earlier. | |||||
| CVE-2022-23943 | 4 Apache, Debian, Fedoraproject and 1 more | 5 Http Server, Debian Linux, Fedora and 2 more | 2025-05-01 | 7.5 HIGH | 9.8 CRITICAL |
| 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 affects Apache HTTP Server 2.4 version 2.4.52 and prior versions. | |||||
| CVE-2022-26377 | 3 Apache, Fedoraproject, Netapp | 3 Http Server, Fedora, Clustered Data Ontap | 2025-05-01 | 5.0 MEDIUM | 7.5 HIGH |
| Inconsistent Interpretation of HTTP Requests ('HTTP Request Smuggling') vulnerability in mod_proxy_ajp of Apache HTTP Server allows an attacker to smuggle requests to the AJP server it forwards requests to. This issue affects Apache HTTP Server Apache HTTP Server 2.4 version 2.4.53 and prior versions. | |||||
| CVE-2022-28615 | 3 Apache, Fedoraproject, Netapp | 3 Http Server, Fedora, Clustered Data Ontap | 2025-05-01 | 6.4 MEDIUM | 9.1 CRITICAL |
| Apache HTTP Server 2.4.53 and earlier may crash or disclose information due to a read beyond bounds in ap_strcmp_match() when provided with an extremely large input buffer. While no code distributed with the server can be coerced into such a call, third-party modules or lua scripts that use ap_strcmp_match() may hypothetically be affected. | |||||
| CVE-2022-30556 | 3 Apache, Fedoraproject, Netapp | 3 Http Server, Fedora, Clustered Data Ontap | 2025-05-01 | 5.0 MEDIUM | 7.5 HIGH |
| Apache HTTP Server 2.4.53 and earlier may return lengths to applications calling r:wsread() that point past the end of the storage allocated for the buffer. | |||||
| CVE-2022-31813 | 3 Apache, Fedoraproject, Netapp | 3 Http Server, Fedora, Clustered Data Ontap | 2025-05-01 | 7.5 HIGH | 9.8 CRITICAL |
| 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. This may be used to bypass IP based authentication on the origin server/application. | |||||
| CVE-2023-27522 | 3 Apache, Debian, Unbit | 3 Http Server, Debian Linux, Uwsgi | 2025-05-01 | N/A | 7.5 HIGH |
| HTTP Response Smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.55. Special characters in the origin response header can truncate/split the response forwarded to the client. | |||||
| CVE-1999-0236 | 2 Apache, Illinois | 2 Http Server, Ncsa Httpd | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| ScriptAlias directory in NCSA and Apache httpd allowed attackers to read CGI programs. | |||||
| CVE-2017-9789 | 1 Apache | 1 Http Server | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| When under stress, closing many connections, the HTTP/2 handling code in Apache httpd 2.4.26 would sometimes access memory after it has been freed, resulting in potentially erratic behaviour. | |||||
| CVE-2017-3169 | 1 Apache | 1 Http Server | 2025-04-20 | 7.5 HIGH | 9.8 CRITICAL |
| 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() during an HTTP request to an HTTPS port. | |||||
| CVE-2017-7659 | 1 Apache | 1 Http Server | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| A maliciously constructed HTTP/2 request could cause mod_http2 in Apache HTTP Server 2.4.24, 2.4.25 to dereference a NULL pointer and crash the server process. | |||||
| CVE-2017-7668 | 6 Apache, Apple, Debian and 3 more | 13 Http Server, Mac Os X, Debian Linux and 10 more | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| The HTTP strict parsing changes added in Apache httpd 2.2.32 and 2.4.24 introduced a bug in token list parsing, which allows ap_find_token() to search past the end of its input string. By maliciously crafting a sequence of request headers, an attacker may be able to cause a segmentation fault, or to force ap_find_token() to return an incorrect value. | |||||
| CVE-2016-0736 | 1 Apache | 1 Http Server | 2025-04-20 | 5.0 MEDIUM | 7.5 HIGH |
| In Apache HTTP Server versions 2.4.0 to 2.4.23, mod_session_crypto was encrypting its data/cookie using the configured ciphers with possibly either CBC or ECB modes of operation (AES256-CBC by default), hence no selectable or builtin authenticated encryption. This made it vulnerable to padding oracle attacks, particularly with CBC. | |||||