Common Weakness Enumeration

CWE-55

Allowed

Path Equivalence: '/./' (Single Dot Directory)

Abstraction: Variant · Status: Incomplete

API response cwe.mitre.org

The product accepts path input in the form of single dot directory exploit ('/./') without appropriate validation, which can lead to ambiguous path resolution and allow an attacker to traverse the file system to unintended locations or access arbitrary files.

2 vulnerabilities reference this CWE, most recent first.

CVE-2026-79768 (GCVE-0-2026-79768)

Vulnerability from cvelistv5 – Published: 2026-10-01 16:18 – Updated: 2026-10-01 20:09
VLAI
Title
Apache HTTP Server: mod_userdir information disclosure
Summary
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.
Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
SSVC
Exploitation: none Automatable: yes Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-01 19:41 UTC
CWE
  • CWE-55 - Path equivalence: '/./' (single dot directory)
Assigner
References
Impacted products
Vendor Product Version
Apache Software Foundation Apache HTTP Server Affected: 2.4.0 , ≤ 2.4.68 (semver)
Create a notification for this product.
Credits
Vlatko Kosturjak, Marlink Cyber
Show details on NVD website
To clipboard 

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GHSA-CR6F-PJRC-7RW2

Vulnerability from github – Published: 2026-10-01 18:32 – Updated: 2026-10-01 21:32
VLAI
Details

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.

Severity
5.3 (Medium)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N
Show details on source website
To clipboard 

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Mitigation MIT-20
Implementation

Strategy: Input Validation

Inputs should be decoded and canonicalized to the application's current internal representation before being validated (CWE-180). Make sure that the application does not decode the same input twice (CWE-174). Such errors could be used to bypass allowlist validation schemes by introducing dangerous inputs after they have been checked.

No CAPEC attack patterns related to this CWE.

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