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CVE-2026-9147— uproot 5.7.4 and prior Code Injection via TStreamerInfo Metadata

Quick assessment

Affected
scikit-hep uproot
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Scikit-HEP Uproot是Scikit-HEP团队的一个用于在纯 Python 和 NumPy 中读取和写入ROOT 文件的库。 Scikit-HEP Uproot 5.7.4及之前版本存在代码注入漏洞，该漏洞源于uproot动态生成Python类源代码时，未对文件控制的流媒体元数据字段（如流媒体元素名称）使用safe quoting进行安全引用，导致攻击者通过特制ROOT文件注入Python表达式，在打开或处理文件的进程环境中执行任意代码。

CVSS 7.8 · High EPSS 0.22% · P12

Possible ATT&CK Techniques 1 AI

T1059 · Command and Scripting Interpreter

Affected Version Matrix 1

VendorProduct Version RangeStatus
scikit-hep uproot ≤ 5.7.4 affected
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I. Basic Information for CVE-2026-9147

Vulnerability Information
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Vulnerability Title
uproot 5.7.4 and prior Code Injection via TStreamerInfo Metadata
Source: CVE Program / CVE List V5
Vulnerability Description
uproot dynamically generates Python class source code from ROOT TStreamerInfo records in a file and compiles it at runtime. Some file-controlled streamer metadata fields (for example, streamer element names) are interpolated into the generated Python source without safe quoting via repr() or the !r format specifier. An attacker who can supply a crafted ROOT file can place Python expression-breaking content into a streamer metadata field. When uproot generates and invokes the corresponding reader method, the injected Python expression is evaluated in the context of the process opening the file, resulting in arbitrary Python code execution in applications that open or process attacker-controlled ROOT files with affected uproot code paths.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
Scikit-HEP Uproot 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Scikit-HEP Uproot是Scikit-HEP团队的一个用于在纯 Python 和 NumPy 中读取和写入ROOT 文件的库。 Scikit-HEP Uproot 5.7.4及之前版本存在代码注入漏洞，该漏洞源于uproot动态生成Python类源代码时，未对文件控制的流媒体元数据字段（如流媒体元素名称）使用safe quoting进行安全引用，导致攻击者通过特制ROOT文件注入Python表达式，在打开或处理文件的进程环境中执行任意代码。
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
scikit-hep uproot 0 ~ 5.7.4 -

II. Public POCs for CVE-2026-9147

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 7023 chars
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III. Intelligence Information for CVE-2026-9147

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Patches & Fixes for CVE-2026-9147 (1)

Vendor Advisories for CVE-2026-9147 (2)

Proof of Concept for CVE-2026-9147 (1)

Other References for CVE-2026-9147 (1)

IV. Related Vulnerabilities

Same weakness: CWE-94

V. Comments for CVE-2026-9147

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