CVE-2026-41205
Description
A flaw was found in Mako, a Python template library. This vulnerability, known as path traversal, allows an attacker to access files outside of the intended directory. By providing a specially crafted input to the TemplateLookup.get_template() function, a remote attacker can exploit an inconsistency in how the system handles URIs starting with //. This could lead to the disclosure of sensitive information from any file readable by the affected application.
Mitigation
To mitigate this issue, applications utilizing the Mako template library must validate and sanitize all input before passing it to the `TemplateLookup.get_template()` function. Implementing robust input validation routines within applications will prevent specially crafted URIs from traversing outside intended directories and accessing sensitive files.
Common Vulnerability Scoring System (CVSS) Score Details
Info alert:Important note
CVSS scores for open source components depend on vendor-specific factors (e.g. version or build chain). Therefore, Red Hat's score and impact rating can be different from NVD and other vendors. Red Hat remains the authoritative CVE Naming Authority (CNA) source for its products and services (see Red Hat classifications).
The following CVSS metrics and score provided are preliminary and subject to review.
CVSS v3 Score Breakdown
| Red Hat | NVD | cve.org | |
|---|---|---|---|
| Base Score | 5.9 | 7.5 | N/A |
| Attack Vector | Network | Network | N/A |
| Attack Complexity | High | Low | N/A |
| Privileges Required | None | None | N/A |
| User Interaction | None | None | N/A |
| Scope | Unchanged | Unchanged | N/A |
| Confidentiality | High | High | N/A |
| Integrity Impact | None | None | N/A |
| Availability Impact | None | None | N/A |
Vector
Red Hat: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
NVD: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
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