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CVE-2026-19896— mangroup dtale Flask Session Cookie app.py build_secret_key random values

Quick assessment

Affected
mangroup dtale
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.

Man D-Tale是Man公司开源的一个 pandas 数据结构的可视化工具。 Man D-Tale 3.22.0及之前版本存在加密问题漏洞，该漏洞源于dtale/app.py文件中的build_secret_key函数在处理Flask Session Cookie时生成随机值不够随机，可能导致远程攻击者预测会话Cookie，造成信息泄露。

CVSS 3.7 · Low EPSS 0.49% · P40

Possible ATT&CK Techniques 1 AI

T1552.004 · Private Keys

Affected Version Matrix 23

VendorProduct Version RangeStatus
mangroup dtale 3.0 affected
3.1 affected
3.2 affected
3.3 affected
3.4 affected
3.5 affected
3.6 affected
3.7 affected
… +15 more rows
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I. Basic Information for CVE-2026-19896

Vulnerability Information
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Vulnerability Title
mangroup dtale Flask Session Cookie app.py build_secret_key random values
Source: CVE Program / CVE List V5
Vulnerability Description
A flaw has been found in mangroup dtale up to 3.22.0. This vulnerability affects the function build_secret_key of the file dtale/app.py of the component Flask Session Cookie. This manipulation causes insufficiently random values. Remote exploitation of the attack is possible. The attack's complexity is rated as high. It is stated that the exploitability is difficult. The exploit has been published and may be used. The pull request to fix this issue awaits acceptance.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用不充分的随机数
Source: CVE Program / CVE List V5
Vulnerability Title
Man D-Tale 加密问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Man D-Tale是Man公司开源的一个 pandas 数据结构的可视化工具。 Man D-Tale 3.22.0及之前版本存在加密问题漏洞，该漏洞源于dtale/app.py文件中的build_secret_key函数在处理Flask Session Cookie时生成随机值不够随机，可能导致远程攻击者预测会话Cookie，造成信息泄露。
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
mangroup dtale 3.0 cpe:2.3:a:mangroup:dtale:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-19896

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III. Intelligence Information for CVE-2026-19896

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Patches & Fixes for CVE-2026-19896 (1)

News Coverage for CVE-2026-19896 (3)

Other References for CVE-2026-19896 (1)

IV. Related Vulnerabilities

Same product: dtale
Same vendor: mangroup
Same weakness: CWE-330

V. Comments for CVE-2026-19896

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