lighttpd 関連製品全体の CVE とセキュリティ脆弱性情報を集約し、CVSS、EPSS、公開日、脆弱性情報データを掲載しています。
過去の問題は主に パス処理の欠陥 and vendor risk memory corruption などに関し、一部は アプリケーションクラッシュ を招き、vendor surface http services and vendor surface web request handling 関連の場面に影響します。
掲載データは公開脆弱性情報とセキュリティ公告に基づき、過去の暴露面と修補優先度の評価に利用できます。
| CVE | 概要 | ソース | CVSS 最大値 | EPSS（%） | 公開 | 更新 |
|---|---|---|---|---|---|---|
| CVE-2025-12642 | lighttpd1.4.80 incorrectly merged trailer fields into headers after http request parsing. This behavior can be exploited to conduct HTTP Header Smuggling attacks. Successful exploitation may allow an attacker to: * Bypass access control rules * Inject unsafe input into backend logic that trusts request headers * Execute HTTP Request Smuggling attacks under some conditions This issue affects lighttpd1.4.80 | 1c6b5737-9389-4011-8117-89fa251edfb2 | 6.9 | 0.05% | 2025-11-03 | 2025-11-12 |
| CVE-2022-41556 | A resource leak in gw_backend.c in lighttpd 1.4.56 through 1.4.66 could lead to a denial of service (connection-slot exhaustion) after a large amount of anomalous TCP behavior by clients. It is related to RDHUP mishandling in certain HTTP/1.1 chunked situations. Use of mod_fastcgi is, for example, affected. This is fixed in 1.4.67. | [email protected] | 7.5 | 1.81% | 2022-10-06 | 2024-11-21 |
| CVE-2022-37797 | In lighttpd 1.4.65, mod_wstunnel does not initialize a handler function pointer if an invalid HTTP request (websocket handshake) is received. It leads to null pointer dereference which crashes the server. It could be used by an external attacker to cause denial of service condition. | [email protected] | 7.5 | 1.44% | 2022-09-12 | 2024-11-21 |
| CVE-2022-30780 | Lighttpd 1.4.56 through 1.4.58 allows a remote attacker to cause a denial of service (CPU consumption from stuck connections) because connection_read_header_more in connections.c has a typo that disrupts use of multiple read operations on large headers. | [email protected] | 7.5 | 81.50% | 2022-06-11 | 2024-11-21 |
| CVE-2022-22707 | In lighttpd 1.4.46 through 1.4.63, the mod_extforward_Forwarded function of the mod_extforward plugin has a stack-based buffer overflow (4 bytes representing -1), as demonstrated by remote denial of service (daemon crash) in a non-default configuration. The non-default configuration requires handling of the Forwarded header in a somewhat unusual manner. Also, a 32-bit system is much more likely to be affected than a 64-bit system. | [email protected] | 5.9 | 1.49% | 2022-01-06 | 2024-11-21 |
| CVE-2019-11072 | lighttpd before 1.4.54 has a signed integer overflow, which might allow remote attackers to cause a denial of service (application crash) or possibly have unspecified other impact via a malicious HTTP GET request, as demonstrated by mishandling of /%2F? in burl_normalize_2F_to_slash_fix in burl.c. NOTE: The developer states "The feature which can be abused to cause the crash is a new feature in lighttpd 1.4.50, and is not enabled by default. It must be explicitly configured in the config file (e | [email protected] | 9.8 | 12.08% | 2019-04-10 | 2024-11-21 |
| CVE-2018-19052 | An issue was discovered in mod_alias_physical_handler in mod_alias.c in lighttpd before 1.4.50. There is potential ../ path traversal of a single directory above an alias target, with a specific mod_alias configuration where the matched alias lacks a trailing '/' character, but the alias target filesystem path does have a trailing '/' character. | [email protected] | 7.5 | 57.12% | 2018-11-07 | 2024-11-21 |
| CVE-2015-3200 | mod_auth in lighttpd before 1.4.36 allows remote attackers to inject arbitrary log entries via a basic HTTP authentication string without a colon character, as demonstrated by a string containing a NULL and new line character. | [email protected] | 7.5 | 20.03% | 2015-06-09 | 2026-05-06 |
| CVE-2014-2324 | Multiple directory traversal vulnerabilities in (1) mod_evhost and (2) mod_simple_vhost in lighttpd before 1.4.35 allow remote attackers to read arbitrary files via a .. (dot dot) in the host name, related to request_check_hostname. | [email protected] | 5.0 | 71.67% | 2014-03-14 | 2026-05-06 |
| CVE-2014-2323 | SQL injection vulnerability in mod_mysql_vhost.c in lighttpd before 1.4.35 allows remote attackers to execute arbitrary SQL commands via the host name, related to request_check_hostname. | [email protected] | 9.8 | 91.04% | 2014-03-14 | 2026-05-06 |
| CVE-2013-4560 | Use-after-free vulnerability in lighttpd before 1.4.33 allows remote attackers to cause a denial of service (segmentation fault and crash) via unspecified vectors that trigger FAMMonitorDirectory failures. | [email protected] | 5.0 | 5.14% | 2013-11-20 | 2026-04-29 |
| CVE-2013-4559 | lighttpd before 1.4.33 does not check the return value of the (1) setuid, (2) setgid, or (3) setgroups functions, which might cause lighttpd to run as root if it is restarted and allows remote attackers to gain privileges, as demonstrated by multiple calls to the clone function that cause setuid to fail when the user process limit is reached. | [email protected] | 7.6 | 9.52% | 2013-11-20 | 2026-04-29 |
| CVE-2013-4508 | lighttpd before 1.4.34, when SNI is enabled, configures weak SSL ciphers, which makes it easier for remote attackers to hijack sessions by inserting packets into the client-server data stream or obtain sensitive information by sniffing the network. | [email protected] | 7.5 | 0.83% | 2013-11-08 | 2026-04-29 |
| CVE-2013-1427 | The configuration file for the FastCGI PHP support for lighttpd before 1.4.28 on Debian GNU/Linux creates a socket file with a predictable name in /tmp, which allows local users to hijack the PHP control socket and perform unauthorized actions such as forcing the use of a different version of PHP via a symlink attack or a race condition. | [email protected] | 1.9 | 0.04% | 2013-03-21 | 2026-04-29 |
| CVE-2012-5533 | The http_request_split_value function in request.c in lighttpd before 1.4.32 allows remote attackers to cause a denial of service (infinite loop) via a request with a header containing an empty token, as demonstrated using the "Connection: TE,,Keep-Alive" header. | [email protected] | 5.0 | 37.91% | 2012-11-24 | 2026-04-29 |
| CVE-2011-4362 | Integer signedness error in the base64_decode function in the HTTP authentication functionality (http_auth.c) in lighttpd 1.4 before 1.4.30 and 1.5 before SVN revision 2806 allows remote attackers to cause a denial of service (segmentation fault) via crafted base64 input that triggers an out-of-bounds read with a negative index. | [email protected] | 5.0 | 4.39% | 2011-12-24 | 2026-04-29 |
| CVE-2010-0295 | lighttpd before 1.4.26, and 1.5.x, allocates a buffer for each read operation that occurs for a request, which allows remote attackers to cause a denial of service (memory consumption) by breaking a request into small pieces that are sent at a slow rate. | [email protected] | 5.0 | 5.56% | 2010-02-03 | 2026-04-29 |
| CVE-2008-4360 | mod_userdir in lighttpd before 1.4.20, when a case-insensitive operating system or filesystem is used, performs case-sensitive comparisons on filename components in configuration options, which might allow remote attackers to bypass intended access restrictions, as demonstrated by a request for a .PHP file when there is a configuration rule for .php files. | [email protected] | 7.5 | 1.14% | 2008-10-03 | 2026-04-23 |
| CVE-2008-4359 | lighttpd before 1.4.20 compares URIs to patterns in the (1) url.redirect and (2) url.rewrite configuration settings before performing URL decoding, which might allow remote attackers to bypass intended access restrictions, and obtain sensitive information or possibly modify data. | [email protected] | 7.5 | 0.51% | 2008-10-03 | 2026-04-23 |
| CVE-2008-4298 | Memory leak in the http_request_parse function in request.c in lighttpd before 1.4.20 allows remote attackers to cause a denial of service (memory consumption) via a large number of requests with duplicate request headers. | [email protected] | 5.0 | 2.65% | 2008-09-27 | 2026-04-23 |