CVE-2026-9147

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.

CVSS v3 7.8 HIGH

7.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.8 / Impact : 5.9

Attack Vector LOCAL

Attack Complexity LOW

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/scikit-hep/uproot5
https://github.com/scikit-hep/uproot5/commit/c045c2824295d907d2e705f31110c742928e50e7
https://github.com/scikit-hep/uproot5/security/advisories/GHSA-6946-mq52-g438
https://www.vulncheck.com/advisories/uproot-and-before-code-injection-via-tstreamerinfo-metadata

Configurations

No configuration.

History

18 Jul 2026, 13:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-07-18 13:17

Updated : 2026-07-23 15:24

NVD link : CVE-2026-9147

Mitre link : CVE-2026-9147

CVE.ORG link : CVE-2026-9147

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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