CVE-2020-1927

CVE-2020-1927 affects Apache HTTP Server 2.4.0–2.4.41, where mod_rewrite redirects intended to be self-referential could be fooled by encoded newlines and redirect to an unexpected URL within the request. Multiple connected advisories confirm the issue and indicate that fixes were released in Apa...

CVE-2024-39884

A regression in the core of Apache HTTP Server 2.4.60 causes it to ignore certain legacy content-type based configurations for handlers, such as AddType . Under specific circumstances where files are requested indirectly, this oversight can lead to the source code disclosure of local content. For...

CVE-2024-24795

The Apache HTTP Server is vulnerable to HTTP response splitting across multiple modules. An attacker capable of injecting malicious response headers into backend applications can exploit this flaw to perform HTTP desynchronization attacks . This issue specifically affects Ubuntu 14.04 LTS , as no...

CVE-2019-10098

The Apache HTTP Server versions 2.4.0 to 2.4.39 are vulnerable to an open redirect flaw in the mod_rewrite component. Specifically, redirects configured with mod_rewrite that are intended to be self-referential can be manipulated by encoded newlines , causing the server to redirect users to an un...

CVE-2019-10092

The CVE-2019-10092 entry concerns Apache HTTP Server 2.4.0–2.4.39 with a limited cross-site scripting in the mod_proxy error page. The vulnerability lets an attacker craft a link on the error page that could mislead users by pointing to a page of the attacker’s choosing, but exploitation requires...

CVE-2016-4975

CVE-2016-4975: Apache HTTP Server is vulnerable to CRLF injection in mod_userdir causing HTTP response splitting. Affected: 2.4.1–2.4.23. Mitigation/fix: upgrade to Apache HTTP Server 2.4.25 (and 2.2.32 for the 2.2 line). The issue is resolved by changes that prohibit CR or LF injection into head...

CVE-2014-0226

Apache HTTP Server CVE-2014-0226 is a race-condition vulnerability in the mod_status component that can cause a heap-based buffer overflow, denial of service, and potentially credential disclosure or code execution. Affects httpd before 2.4.10; the issue arises from improper scoreboard handling i...

CVE-2012-0883

CVE-2012-0883 affects the Apache HTTP Server up to version 2.4.2, where the envvars (envvars-std) feature places a zero-length directory name in LD_LIBRARY_PATH. This enables local users to gain privileges by exploiting a Trojan horse DSO in the current working directory during execution of apach...

CVE-2017-12171

CVE-2017-12171 is a vulnerability reported for Red Hat Enterprise Linux 6.9 with httpd 2.2.15-60. The regression causes comments in the Allow and Deny directives to be parsed incorrectly, potentially allowing a remote attacker to bypass access controls and gain access to a restricted HTTP resourc...

CVE-2025-65082

The Apache HTTP Server versions 2.4.0 through 2.4.65 are vulnerable to an Improper Neutralization of Escape, Meta, or Control Sequences vulnerability (CWE-150). The root cause is that environment variables defined via the Apache configuration can unexpectedly supersede variables calculated by the...

CVE-2025-54090

A bug in Apache HTTP Server 2.4.64 causes all RewriteCond expr ... tests to evaluate as true . This regression affects the logic of the rewrite engine. Impacted software includes HP-UX Apache-based Web Server (prior to B.2.4.65.00). Users are recommended to upgrade to version 2.4.65 to resolve th...

CVE-2007-1741

CVE-2007-1741 affects Apache HTTP Server (httpd) and its suexec module (v2.2.3). The issue comprises multiple race conditions between directory/file validation and their usage in suexec, enabling local users to gain privileges and execute arbitrary code by renaming directories or performing symli...

CVE-2026-29170

A cross-site scripting (XSS) vulnerability exists in the mod_proxy_ftp module of the Apache HTTP Server (version 2.4.67 and earlier). The flaw occurs during the generation of HTML directory listings when the server lists FTP directory contents through either a forward or reverse proxy configurati...

CVE-2007-4465

The CVE-2007-4465 entry covers an XSS in Apache httpd’s mod_autoindex.c (pre-2.2.6) where an undefined page charset allows injection via the P parameter using UTF-7. Impact is cross-site scripting; remediation is to upgrade Apache httpd to 2.2.6 or newer (as per the cited advisory). The descripti...

CVE-2026-43951

The Apache HTTP Server versions 2.4.0 through 2.4.67 are vulnerable to an Out-of-bounds Read vulnerability involving the mod_headers and mod_mime modules when handling multiple response languages. This flaw allows an attacker to read data beyond the permitted memory range, potentially compromisin...

CVE-2006-4154

CVE-2006-4154 describes a format-string vulnerability in the Apache mod_tcl module (version 1.0 for Apache 2.x). The root cause is format string handling in calls to set_var (in tcl_cmds.c and tcl_core.c), allowing a remote attacker to execute arbitrary code with the httpd process privileges. Aff...

CVE-2009-1956

CVE-2009-1956: Off-by-one error in apr_brigade_vprintf in Apache APR-util before 1.3.5 on big-endian platforms. Remote attackers could obtain sensitive information or cause a denial of service (application crash) via crafted input. Affected product: APR-util (pre-1.3.5) used with APR/httpd; impac...

CVE-2002-0840

CVE-2002-0840 is a cross-site scripting (XSS) vulnerability in the default error page of Apache. It affects Apache 2.0 before 2.0.43 and 1.3.x up to 1.3.26, when UseCanonicalName is set to off and wildcard DNS is supported. An attacker can inject script via the Host header to execute in other vis...

CVE-2010-0010

The CVE-2010-0010 issue affects Apache HTTP Server’s mod_proxy (proxy_util.c) on 64-bit platforms. The root cause is an integer overflow in the ap_proxy_send_fb function when handling large chunk sizes, which can trigger a heap-based buffer overflow. This condition enables a remote origin server ...

CVE-2004-0493

The CVE-2004-0493 entry relates to Apache httpd 2.0.x prior to 2.0.50, where long MIME header lines with excessive spaces/tabs can cause memory exhaustion and, on 64-bit systems, a potential heap-based buffer overflow. Connected advisories confirm DoS concerns across Apache 2.0.x and related modu...

CVE-2003-0192

CVE-2003-0192 describes an issue in Apache 2.x before 2.0.47 (and mod_ssl for Apache 1.3) where certain sequences of per-directory renegotiations combined with using SSLCipherSuite to upgrade a weak cipher could cause the server to continue using a weak cipher. The connected advisories confirm af...

CVE-2026-33523

The Apache HTTP Server is vulnerable to an HTTP response splitting vulnerability affecting multiple modules when interacting with untrusted or compromised backend servers. This issue impacts versions through 2.4.66 . Successful exploitation could allow an attacker to compromise the confidentialit...