CVE-2026-9147 PUBLISHED

uproot 5.7.4 and prior Code Injection via TStreamerInfo Metadata

Assigner: VulnCheck
Reserved: 20.05.2026 Published: 18.07.2026 Updated: 18.07.2026

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.

Metrics

CVSS Vector: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:P/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
CVSS Score: 8.5

Product Status

Vendor scikit-hep
Product uproot
Versions Default: affected
  • affected from 0 to 5.7.4 (incl.)

Credits

  • Sai Teja Erukude finder

References

Problem Types

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