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CVE-2026-44307— Mako: Path traversal via backslash URI on Windows in TemplateLookup

Quick assessment

Affected
sqlalchemy mako
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.

mako是SQLAlchemy开源的一个用 Python 编写的模板库。提供了一种熟悉的非 XML 语法，可编译成 Python 模块以获得最佳性能。 Mako 1.3.12之前版本存在路径遍历漏洞，该漏洞源于Windows上反斜杠遍历绕过目录遍历检查，可能导致读取配置模板目录外的文件。

AI Predicted 7.5 Difficulty: Easy EPSS 0.61% · P46

Possible ATT&CK Techniques 1 AI

T1083 · File and Directory Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
sqlalchemy mako < 1.3.12 affected
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I. Basic Information for CVE-2026-44307

Vulnerability Information
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Vulnerability Title
Mako: Path traversal via backslash URI on Windows in TemplateLookup
Source: CVE Program / CVE List V5
Vulnerability Description
Mako is a template library written in Python. Prior to 1.3.12, on Windows, a URI using backslash traversal (e.g. \..\..\ secret.txt) bypasses the directory traversal check in Template.__init__ and the posixpath-based normalization in TemplateLookup.get_template(), allowing reads of files outside the configured template directory. This vulnerability is fixed in 1.3.12.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
对路径名的限制不恰当(路径遍历)
Source: CVE Program / CVE List V5
Vulnerability Title
mako 路径遍历漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
mako是SQLAlchemy开源的一个用 Python 编写的模板库。提供了一种熟悉的非 XML 语法，可编译成 Python 模块以获得最佳性能。 Mako 1.3.12之前版本存在路径遍历漏洞，该漏洞源于Windows上反斜杠遍历绕过目录遍历检查，可能导致读取配置模板目录外的文件。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
sqlalchemy mako < 1.3.12 -

II. Public POCs for CVE-2026-44307

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III. Intelligence Information for CVE-2026-44307

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Patches & Fixes for CVE-2026-44307 (2)

Vendor Advisories for CVE-2026-44307 (1)

Other References for CVE-2026-44307 (1)

IV. Related Vulnerabilities

Same product: mako
Same vendor: sqlalchemy
Same weakness: CWE-22

V. Comments for CVE-2026-44307

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