PT-2026-60965 · Scikit Hep · Uproot

CVE-2026-9147 · Published 2026-07-18 · Updated 2026-07-18

Mitre

CVSS v3.1

7.8

High

Base vector

AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

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.

Fix

Code Injection

Weakness Enumeration

CWE-94

Related Identifiers

CVE-2026-9147

Affected Products

Uproot

References · 5

• https://nvd.nist.gov/vuln/detail/CVE-2026-9147 · Security Note
• https://github.com/scikit-hep/uproot5/security/advisories/GHSA-6946-mq52-g438 · Note
• https://github.com/scikit-hep/uproot5/commit/c045c2824295d907d2e705f31110c742928e50e7 · Note
• https://github.com/scikit-hep/uproot5 · Note
• https://vulncheck.com/advisories/uproot-and-before-code-injection-via-tstreamerinfo-metadata · Note