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CVE-2026-42356— Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories

Quick assessment

Affected
Apache Software Foundation Apache HTTP Server
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Apache HTTP Server 中存在一个“错误处理器部署”漏洞，该漏洞可能导致某些从 CGI 程序发起的内部重定向目标也被当作 CGI 处理并执行。该目标必须位于已启用 CGI 的目录中，且没有其他被 mod_mime 模块识别的文件扩展名。 此问题影响 Apache HTTP Server 2.4.60 至 2.4.68 版本。

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I. Basic Information for CVE-2026-42356

Vulnerability Information
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Vulnerability Title
Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI directories
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
错误句柄的实施
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache HTTP Server 2.4.60 ~ 2.4.68 -

II. Public POCs for CVE-2026-42356

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III. Intelligence Information for CVE-2026-42356

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Vendor Advisories for CVE-2026-42356 (1)

Same Patch Batch · Apache Software Foundation · 2026-10-01 · 28 CVEs total

CVE-2026-88789 8.6 HIGH Apache Camel Quarkus: Camel Quarkus: Forced Xalan TransformerFactory drops upstream extern
CVE-2026-94250 8.2 HIGH Apache APISIX: Batch response aggregation can exhaust worker memory
CVE-2026-94212 6.4 MEDIUM Apache APISIX: unauthenticated impersonation issue in saml-auth
CVE-2026-94269 6.3 MEDIUM Apache APISIX: Servlet-style normalization creates a route/upstream authorization mismatch
CVE-2026-78242 5.7 MEDIUM Apache APISIX: data-mask may fail to redact request headers in logger output
CVE-2026-82806 5.3 MEDIUM Apache APISIX: cross-request permission pollution via static permission list mutation
CVE-2026-94276 5.1 MEDIUM Apache APISIX: Openid-connect introspection validation issue
CVE-2026-94220 2.1 LOW Apache APISIX: session fixation issue in feishu-auth and dingtalk-auth plugin
CVE-2026-56154 Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}
CVE-2026-42528 Apache HTTP Server: mod_dav shared lock overflow
CVE-2026-46729 Apache HTTP Server: mod_heartmonitor denial of service
CVE-2026-47360 Apache HTTP Server: mod_session: Session cookie not removed during internal redirect
CVE-2026-48005 Apache HTTP Server: mod_auth_digest reauthentication attack
CVE-2026-56153 Apache HTTP Server: mod_charset_lite: Heap overflow in finish_partial_char
CVE-2026-63686 Apache HTTP Server: mod_xml2enc crash on charset conversion failure
CVE-2026-56449 Apache HTTP Server: mod_proxy_html: crash in dump_content
CVE-2026-57941 Apache HTTP Server: mod_http2 use-after-free / wild write via shared session->bbtmp re-ent
CVE-2026-58415 Apache HTTP Server: mod_dav_fs property database read access
CVE-2026-59685 Apache HTTP Server: Out-of-Bounds Write in ap_directory_walk() Canonical-Name Rewrite on C
CVE-2026-59797 Apache HTTP Server: mod_ssl SSLRequire allows .htaccess ap_expr file-function

Showing top 20 of 28 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Apache HTTP Server
Same vendor: Apache Software Foundation
Same weakness: CWE-430

V. Comments for CVE-2026-42356

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