Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-93546— Apache HTTP Server: mod_dav_fs namespace overflow

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 2.4.68 及更早版本中的 mod_dav_fs 模块存在整数溢出漏洞。拥有写权限的已认证 WebDAV 客户端可通过发送声明大量 XML 命名空间的 PROPPATCH 请求，导致 worker 进程崩溃，并持久性地损坏目录的属性数据库。

Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-93546

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
Apache HTTP Server: mod_dav_fs namespace overflow
Source: CVE Program / CVE List V5
Vulnerability Description
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.
Source: CVE Program / CVE List V5
CVSS Information
N/A
Source: CVE Program / CVE List V5
Vulnerability Type
整数溢出或超界折返
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Apache Software Foundation Apache HTTP Server 0 ~ 2.4.68 -

II. Public POCs for CVE-2026-93546

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-93546

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-93546 (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-2026-56153 Apache HTTP Server: mod_charset_lite: Heap overflow in finish_partial_char
CVE-2026-42528 Apache HTTP Server: mod_dav shared lock overflow
CVE-2026-42356 Apache HTTP Server: limited RCE for some internal redirects to non-CGI files in CGI direct
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-2026-63686 Apache HTTP Server: mod_xml2enc crash on charset conversion failure
CVE-2026-56154 Apache HTTP Server: mod_rewrite use-after-free via %{LA-U:HTTP:...}
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

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-190

V. Comments for CVE-2026-93546

No comments yet

Leave a comment