Apache HTTPD 2.4.0-2.4.68 OOB Write via 8.3 path expansion on Windows
CVE-2026-59685 Published on October 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.
Vulnerability Analysis
CVE-2026-59685 can be exploited with network access, and does not require authorization privileges or user interaction. This vulnerability is considered to have a low attack complexity. The potential impact of an exploit of this vulnerability is considered to have a high impact on confidentiality, with no impact on integrity and availability.
Timeline
reported
fixed in 2.4.x by r1938670 148 days later.
2.4.69 released
Weakness Type
What is a Memory Corruption Vulnerability?
The software writes data past the end, or before the beginning, of the intended buffer. Typically, this can result in corruption of data, a crash, or code execution. The software may modify an index or perform pointer arithmetic that references a memory location that is outside of the boundaries of the buffer. A subsequent write operation then produces undefined or unexpected results.
CVE-2026-59685 has been classified to as a Memory Corruption vulnerability or weakness.
Products Associated with CVE-2026-59685
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Affected Versions
Apache Software Foundation Apache HTTP Server:- Version 2.4.0, <= 2.4.68 is affected.