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CVE-2026-9147

7.8 · HIGH

uproot dynamically generates Python class source code from ROOT TStreamerInfo records in a file and compiles it at runtime.

Published Jul 18, 2026CWE-94EPSS 0.22%

Overview

CVE-2026-9147 is a high-severity vulnerability. It was published on July 18, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

Technical 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.

Remediation

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

References

GitHubgithub.com/SaiTeja-Erukude/CVE-2026-9147-uproot-rceGitHubgithub.com/scikit-hep/uproot5GitHubgithub.com/scikit-hep/uproot5/commit/c045c2824295d907d2e705f31110c742928e50e7GitHubgithub.com/scikit-hep/uproot5/security/advisories/GHSA-6946-mq52-g438Refwww.vulncheck.com/advisories/uproot-and-before-code-injection-via-tstreamerinfo-metadata

How CyberStrike helps

Frequently asked questions

What is CVE-2026-9147?

CVE-2026-9147 is a high-severity vulnerability. It was published on July 18, 2026 and has a CVSS 3.1 base score of 7.8 (HIGH).

How severe is CVE-2026-9147?

This vulnerability has a CVSS 3.1 base score of 7.8, rated HIGH. It requires local or adjacent network access to exploit. No authentication or special privileges are required for exploitation.

How do I fix or remediate CVE-2026-9147?

Check the references section for vendor advisories, patches, and mitigation guidance. If immediate patching is not possible, review the CVSS vector to understand the attack surface and apply compensating controls such as network segmentation or access restrictions.

How can CyberStrike help with CVE-2026-9147?

CyberStrike is an open-source, AI-augmented pentesting engine. Rather than flag a version number, it tests whether an issue like CVE-2026-9147 is actually reachable in your own applications and APIs, then verifies each finding before reporting it. That tells you if the weakness is a real, exploitable risk in your environment or a false positive you can safely deprioritize.

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