Apache Software Foundation vulnerabilities

CVE-2026-103877 Critical · 9.8 CWE-502 Oct 2, 2026

Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue...

Deserialization of Untrusted Data vulnerability in Apache Directory LDAP API. A rogue/compromised LDAP server (or pre-TLS MITM) can answer a client's loadSchema() subschema search with a schema object that contains a serialized Java class, allowing some potential RCE. This issue affects Apache Directory LDAP API: from 2.1.0 before 2.1.9. Users are recommended to upgrade to version 2.1.9, which fixes the issue.

CVE-2026-102731 High · 7.5 CWE-789 Oct 2, 2026

Apache Directory LDAP API: Denial of service via excessive memory allocation in BER decode

Memory allocation with excessive size value vulnerability in Apache Directory LDAP API. A malicious peer (or a MITM) can send a small BER-encoded response causing a large memory allocation before any data is received. This can lead to an OutOfMemoryError and denial of service. The client JVM OOMs (OutOfMemoryError bypasses the DecoderException handlers) or pins the large allocation per connection while the attacker stalls. A handful of connections exhausts any heap. The same bytes from an unauthenticated pre-bind client hit any embedding server that did not set MAX_PDU_SIZE_ATTR. This issue affects Apache Directory LDAP API: from 1.2.0 before 1.2.9. Users are recommended to upgrade to version 1.2.9, which fixes the issue.

CVE-2026-93546 High · 8.8 CWE-190 Oct 1, 2026

Apache HTTP Server: mod_dav_fs namespace overflow

Integer overflow in mod_dav_fs in Apache HTTP Server through 2.4.68 allows an authenticated WebDAV client with write access to crash worker processes and persistently corrupt a directory's property database via PROPPATCH requests declaring many XML namespaces.

CVE-2026-79768 Medium · 5.3 CWE-55 Oct 1, 2026

Apache HTTP Server: mod_userdir information disclosure

Path equivalence: '/./' (single dot directory) vulnerability in Apache HTTP Server's mod_userdir module when configured with absolute non-wildcard UserDir directive (the 2nd form in https://httpd.apache.org/docs/2.4/mod/mod_userdir.html#userdir) This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-73637 High · 7.3 CWE-416 Oct 1, 2026

Apache HTTP Server: mod_auth_digest DoS attack

Use after free in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause authentication state corruption via concurrent Digest authentication requests when AuthDigestNcCheck is enabled or AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-73636 High · 8.1 CWE-294 Oct 1, 2026

Apache HTTP Server: mod_auth_digest one-time-nonce replay attack

Authentication bypass by capture-replay in mod_auth_digest in Apache Software Foundation Apache HTTP Server 2.4.x on all platforms allows a man-in-the-middle (MITM) attacker to replay captured digest authentication credentials via crafted requests that trigger garbage collection of the client's shared memory entry when AuthDigestNonceLifetime is set to 0. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-63718 High · 7.5 CWE-444 Oct 1, 2026

Apache HTTP Server: mod_proxy_uwsgi Transfer-Encoding response smuggling

Inconsistent Interpretation of HTTP Requests ('HTTP Request/Response Smuggling') response smuggling vulnerability in Apache HTTP Server via mod_proxy_uwsgi and a crafted uwsgi response with Transfer-Encoding. This issue affects Apache HTTP Server: from 2.4.30 through 2.4.68.

CVE-2026-63686 High · 7.5 CWE-476 Oct 1, 2026

Apache HTTP Server: mod_xml2enc crash on charset conversion failure

A NULL pointer dereference in mod_xml2enc in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an untrusted backend server to cause a denial of service via a proxied response with a charset whose conversion partially succeeds then fails. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-63292 High · 7.5 CWE-121 Oct 1, 2026

Apache HTTP Server: mod_vhost_alias stack overflow

Stack-based buffer overflow in mod_vhost_alias in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows a remote client to cause a denial of service or potentially execute arbitrary code via an HTTP request with a Host header exceeding 8192 bytes when VirtualDocumentRoot uses a hostname format specifier and LimitRequestFieldSize is raised above the default. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-63045 High · 7.5 CWE-284 Oct 1, 2026

Apache HTTP Server: mod_proxy_ftp PASV address handling

Improper validation of FTP PASV reply address in mod_proxy_ftp in Apache Software Foundation Apache HTTP Server through 2.4.68 on all platforms allows, in forward proxy configurations, an untrusted FTP server to cause the proxy to open a data connection to an arbitrary third-party host via a crafted PASV response. Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-59797 Critical · 9.8 CWE-269 Oct 1, 2026

Apache HTTP Server: mod_ssl SSLRequire allows .htaccess ap_expr file-function

Improper Privilege Management vulnerability in Apache HTTP Server's mod_ssl via SSLRequire and file-related expressions. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-59685 High · 7.5 CWE-787 Oct 1, 2026

Apache HTTP Server: Out-of-Bounds Write in ap_directory_walk() Canonical-Name Rewrite on CASE_BLIND_FILESYSTEM

Out-of-bounds Write vulnerability in Apache HTTP Server on Windows while processing paths with 8.3 names that may grow when expanded. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-58415 Medium · 5.3 CWE-552 Oct 1, 2026

Apache HTTP Server: mod_dav_fs property database read access

Internal state files accessible to external parties in mod_dav_fs in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows a remote client to read WebDAV dead properties of resources it cannot author via a GET request for the .DAV state directory This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-57941 Critical · 9.8 CWE-416 Oct 1, 2026

Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-entrancy

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 through 2.4.68.

CVE-2026-56449 High · 7.5 CWE-787 Oct 1, 2026

Apache HTTP Server: mod_proxy_html: crash in dump_content

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_proxy_html with crafted HTTP response bodies. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-56154 Critical · 9.8 CWE-416 Oct 1, 2026

Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}

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 through 2.4.68.

CVE-2026-56153 High · 7.5 CWE-787 Oct 1, 2026

Apache HTTP Server: mod_charset_lite: Heap overflow in finish_partial_char

Out-of-bounds Write vulnerability in Apache HTTP Server's mod_charset_lite. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-48005 High · 7.5 CWE-306 Oct 1, 2026

Apache HTTP Server: mod_auth_digest reauthentication attack

Missing authentication checks in mod_auth_digest in Apache Software Foundation Apache HTTP Server before 2.4.69 on all platforms allows an unauthenticated remote client to cause a denial of service (forced re-authentication) via forged Authorization headers when Digest authentication is enabled with AuthDigestNcCheck . Users are recommended to upgrade to version 2.4.69, which fixes this issue.

CVE-2026-47360 High · 7.5 CWE-200 Oct 1, 2026

Apache HTTP Server: mod_session: Session cookie not removed during internal redirect

Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Apache HTTP Server's mod_session_cookie module. When SessionCookieRemove changes across internal redirects, the session cookie may still be passed to a backend server. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-46729 High · 7.5 CWE-476 Oct 1, 2026

Apache HTTP Server: mod_heartmonitor denial of service

NULL Pointer Dereference vulnerability in Apache HTTP Servers mod_heartmonitor over unicast listener. This issue affects Apache HTTP Server: from 2.4.0 through 2.4.68.

CVE-2026-42528 Medium · 4.3 CWE-789 Oct 1, 2026

Apache HTTP Server: mod_dav shared lock overflow

A memory calculation bug in mod_dav in Apache httpd 2.4.67 and earlier allows an attacker with permission to create WebDAV locks to crash server child processes. Users are recommended to upgrade to version 2.4.69, which fixes this issue

CVE-2026-42356 Low · 3.7 CWE-430 Oct 1, 2026

Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories

Deployment of wrong handler vulnerability in Apache HTTP Server allows the target of some internal redirects from CGI programs to also be treated as CGI and executed. The target must already be in a directory enabled for CGI and have no other extension understood by mod_mime. This issue affects Apache HTTP Server: from 2.4.60 through 2.4.68.

CVE-2026-94276 Medium · 5.1 CWE-287 Oct 1, 2026

Apache APISIX: Openid-connect introspection validation issue

Improper Authentication vulnerability in Apache APISIX. On a route using openid-connect plugin with remote introspection against an authorization server that serves multiple issuers, a token that introspects as active for one issuer may get accepted on a route restricted to another. This issue affects Apache APISIX: from 3.12.0 through 3.18.0. Users are recommended to upgrade to version 3.19.0, which fixes the issue.

CVE-2026-94269 Medium · 6.3 CWE-647 Oct 1, 2026

Apache APISIX: Servlet-style normalization creates a route/upstream authorization mismatch

Use of Non-Canonical URL paths for authorization decisions vulnerability in Apache APISIX. In some configurations where a permissive route overlaps a protected one, a crafted encoded path can reach an upstream endpoint that the matched route's policies were never meant to cover. A request that should have been rejected is served instead, giving unauthenticated access to a protected upstream endpoint. This issue affects Apache APISIX: from 2.14.1 through 3.18.0. Users are recommended to upgrade to version 3.19.0, which fixes the issue.

CVE-2026-94250 High · 8.2 CWE-770 Oct 1, 2026

Apache APISIX: Batch response aggregation can exhaust worker memory

Allocation of resources without limits or throttling vulnerability in batch-requests plugin in Apache APISIX. An unauthenticated caller can drive a gateway worker into OOM via a route where the batch-requests plugin is used and the batch endpoint is publicly exposed. This issue affects Apache APISIX: from 1.3.0 through 3.18.0. Users are recommended to upgrade to version 3.19.0, which fixes the issue.