HS
Web Server
HTTP Server
On CISA KEVExploited in the wildRansomware-linked
351
CVEs
5
On KEV
9.8
Max CVSS
20
New 30D
Severity mix
Critical 33High 93Medium 43Low 1
Watch
Add HTTP Server to your stack to get only the CVEs that touch what you run.
| CVE | CVSS | Published | Summary · affected versions |
|---|---|---|---|
| CVE-2021-42013 RansomwareIn wildKEV | 9.8 | Oct 7 | Path Traversal and Remote Code Execution in Apache HTTP Server 2.4.49 and 2.4.50 (incomplete fix of CVE-2021-41773) Affected: Apache HTTP Server 2.4.49; Apache HTTP Server 2.4.50 |
| CVE-2021-41773 RansomwareIn wildKEV | 9.8 | Oct 5 | Path traversal and file disclosure vulnerability in Apache HTTP Server 2.4.49 Affected: Apache HTTP Server 2.4 2.4.49 |
| CVE-2024-38475 In wildKEV | 9.1 | Jul 1 | Apache HTTP Server weakness in mod_rewrite when first segment of substitution matches filesystem path. Affected: 2.4.0 through 2.4.59 |
| CVE-2021-40438 RansomwareIn wildKEV | 9.0 | Sep 16 | mod_proxy SSRF Affected: Apache HTTP Server 2.4 through 2.4.48 |
| CVE-2019-0211 In wildKEV | 7.8 | Apr 8 | Apache HTTP Server Privilege Escalation Vulnerability Affected: 2.4.17 to 2.4.38 |
| CVE-2026-59797 | 9.8 | Oct 1 | Apache HTTP Server: mod_ssl SSLRequire allows .htaccess ap_expr file-function Affected: 2.4.0 through 2.4.68 |
| CVE-2026-57941 | 9.8 | Oct 1 | Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy Affected: 2.4.0 through 2.4.68 |
| CVE-2026-56154 | 9.8 | Oct 1 | Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...} Affected: 2.4.0 through 2.4.68 |
| CVE-2026-44631 | 9.8 | Jun 8 | Apache HTTP Server: Heap Underflow in `ap_regname` via Signed Char Overflow Affected: 2.4.0 through 2.4.67 |
| CVE-2026-29167 | 9.8 | Jun 8 | Apache HTTP Server: mod_ldap per-dir use-after-free Affected: 2.4.0 through 2.4.67 |
| CVE-2026-28780 | 9.8 | May 5 | Apache HTTP Server: buffer overflow in mod_proxy_ajp via ajp_msg_check_header() Affected: through 2.4.66 |
| CVE-2024-38476 | 9.8 | Jul 1 | Vulnerability in core of Apache HTTP Server 2.4.59 and earlier are vulnerably to information disclosure, SSRF or local script execution via backend applications whose response… Affected: 2.4.0 before 2.4.60 |
| CVE-2024-38474 | 9.8 | Jul 1 | 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 configuration but not… Affected: 2.4.0 before 2.4.60 |
| CVE-2023-25690 | 9.8 | Mar 7 | Some mod_proxy configurations on Apache HTTP Server versions 2.4.0 through 2.4.55 allow a HTTP Request Smuggling attack Affected: 2.4.0 through 2.4.55 |
| CVE-2022-31813 | 9.8 | Jun 9 | 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 Affected: before 2.4.54 |
| CVE-2022-23943 | 9.8 | Mar 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 Affected: 2.4.0 before 2.4.53 |
| CVE-2022-22720 | 9.8 | Mar 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 Request Smuggling Affected: through 2.4.52 |
| CVE-2021-44790 | 9.8 | Dec 20 | A carefully crafted request body can cause a buffer overflow in the mod_lua multipart parser (r:parsebody() called from Lua scripts) Affected: before 2.4.52 |
| CVE-2021-39275 | 9.8 | Sep 16 | ap_escape_quotes() may write beyond the end of a buffer when given malicious input Affected: before 2.4.49 |
| CVE-2021-26691 | 9.8 | Jun 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 Affected: 2.4.0 through 2.4.46 |
| CVE-2020-11984 | 9.8 | Aug 7 | Apache HTTP server 2.4.32 to 2.4.44 mod_proxy_uwsgi info disclosure and possible RCE Affected: 2.4.32 through 2.4.43 |
| CVE-2018-1312 | 9.8 | Mar 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 using a pseudo-random… Affected: 2.4.1; 2.4.2; 2.4.3; 2.4.4; 2.4.6; 2.4.7; +13 more |
| CVE-2017-7679 | 9.8 | Jun 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 header Affected: 2.2.0 before 2.2.33; 2.4.0 before 2.4.26 |
| CVE-2017-3169 | 9.8 | Jun 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() during an HTTP… Affected: 2.2.0; 2.2.2; 2.2.3; 2.2.11; 2.2.12; 2.2.13; +28 more |
| CVE-2017-3167 | 9.8 | Jun 20 | In Apache httpd 2.2.x before 2.2.33 and 2.4.x before 2.4.26, use of the ap_get_basic_auth_pw() by third-party modules outside of the authentication phase may lead to… Affected: 2.2.0 before 2.2.33; 2.4.0 before 2.4.26 |
| CVE-2009-3555 | 9.8 | Nov 9 | The TLS protocol, and the SSL protocol 3.0 and possibly earlier, as used in Microsoft Internet Information Services (IIS) 7.0, mod_ssl in the Apache HTTP Server 2.2.14 and… Affected: through 2.2.14 |
| CVE-2001-0766 | 9.8 | Oct 18 | Apache on MacOS X Client 10.0.3 with the HFS+ file system allows remote attackers to bypass access restrictions via a URL that contains some characters whose case is not matched… Affected: 1.3.14 |
| CVE-2026-42535 | 9.1 | Jun 8 | Apache HTTP Server: mod_dav_fs protected directory access Affected: through 2.4.67 |
| CVE-2025-23048 | 9.1 | Jul 10 | In some mod_ssl configurations on Apache HTTP Server 2.4.35 through to 2.4.63, an access control bypass by trusted clients is possible using TLS 1.3 session resumption Affected: 2.4.35 before 2.4.64 |
| CVE-2022-28615 | 9.1 | Jun 9 | 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 Affected: before 2.4.54 |
| CVE-2022-22721 | 9.1 | Mar 14 | If LimitXMLRequestBody is set to allow request bodies larger than 350MB (defaults to 1M) on 32 bit systems an integer overflow happens which later causes out of bounds writes Affected: through 2.4.52 |
| CVE-2019-10082 | 9.1 | Sep 26 | In Apache HTTP Server 2.4.18-2.4.39, using fuzzed network input, the http/2 session handling could be made to read memory after being freed, during connection shutdown Affected: 2.4.18 through 2.4.39 |
| CVE-2017-9788 | 9.1 | Jul 13 | In Apache httpd before 2.2.34 and 2.4.x before 2.4.27, the value placeholder in [Proxy-]Authorization headers of type 'Digest' was not initialized or reset before or between… Affected: through 2.2.33; 2.4.0 through 2.4.26 |
| CVE-2022-36760 | 9.0 | Jan 17 | 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… Affected: 2.4.0 before 2.4.55 |
| CVE-2026-93546 | 8.8 | Oct 1 | Apache HTTP Server: mod_dav_fs namespace overflow Affected: through 2.4.68 |
| CVE-2026-23918 | 8.8 | May 4 | Apache HTTP Server: http2: double free and possible RCE on early reset Affected: 2.4.66 |
| CVE-2026-24072 | 8.8 | May 4 | Apache HTTP Server: mod_rewrite elevation of privileges via ap_expr Affected: through 2.4.66 |
| CVE-2025-58098 | 8.3 | Dec 5 | Apache HTTP Server 2.4.65 and earlier with Server Side Includes (SSI) enabled and mod_cgid (but not mod_cgi) passes the shell-escaped query string to #exec cmd="..." directives Affected: before 2.4.66 |
| CVE-2021-44224 | 8.2 | Dec 20 | A crafted URI sent to httpd configured as a forward proxy (ProxyRequests on) can cause a crash (NULL pointer dereference) or, for configurations mixing forward and reverse proxy… Affected: 2.4.7 before 2.4.52 |
| CVE-2026-73636 | 8.1 | Oct 1 | Apache HTTP Server: mod_auth_digest one-time-nonce replay attack Affected: 2.4.0 through 2.4.68 |
| CVE-2024-38473 | 8.1 | Jul 1 | Encoding problem in mod_proxy in Apache HTTP Server 2.4.59 and earlier allows request URLs with incorrect encoding to be sent to backend services, potentially bypassing… Affected: 2.4.0 before 2.4.60 |
| CVE-2017-15715 | 8.1 | Mar 26 | In Apache httpd 2.4.0 to 2.4.29, the expression specified in <FilesMatch> could match '$' to a newline character in a malicious filename, rather than matching only the end of the… Affected: 2.4.0 through 2.4.29 |
| CVE-2016-5387 | 8.1 | Jul 19 | The Apache HTTP Server through 2.4.23 follows RFC 3875 section 4.1.18 and therefore does not protect applications from the presence of untrusted client data in the HTTP_PROXY… Affected: 2.2.0 through 2.2.31; 2.4.1 through 2.4.23 |
| CVE-2004-0940 | 7.8 | Feb 9 | Buffer overflow in the get_tag function in mod_include for Apache 1.3.x to 1.3.32 allows local users who can create SSI documents to execute arbitrary code as the apache user via… Affected: 1.3 through 1.3.32 |
| CVE-2004-0747 | 7.8 | Oct 20 | Buffer overflow in Apache 2.0.50 and earlier allows local users to gain apache privileges via a .htaccess file that causes the overflow during expansion of environment variables Affected: 2.0.35 before 2.0.51 |
| CVE-2026-63686 | 7.5 | Oct 1 | Apache HTTP Server: mod_xml2enc crash on charset conversion failure Affected: 2.4.0 through 2.4.68 |
| CVE-2026-63718 | 7.5 | Oct 1 | Apache HTTP Server: mod_proxy_uwsgi Transfer-Encoding response smuggling Affected: 2.4.30 through 2.4.68 |
| CVE-2026-63292 | 7.5 | Oct 1 | Apache HTTP Server: mod_vhost_alias stack overflow Affected: 2.4.0 through 2.4.68 |
| CVE-2026-63045 | 7.5 | Oct 1 | Apache HTTP Server: mod_proxy_ftp PASV address handling Affected: 2.4.0 through 2.4.68 |
| CVE-2026-59685 | 7.5 | Oct 1 | Apache HTTP Server: Out-of-Bounds Write in ap_directory_walk() Canonical-Name Rewrite on CASE_BLIND_FILESYSTEM Affected: 2.4.0 through 2.4.68 |
