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CVE-2026-9147 is a code injection vulnerability in scikit-hep uproot affecting versions up to and including 5.7.4. Uproot dynamically generates Python class source code from ROOT TStreamerInfo records contained in a file and compiles that code at runtime. Certain file-controlled streamer metadata fields, including streamer element names, are interpolated into the generated Python source without safe quoting such as repr() or the !r format specifier. A crafted ROOT file can therefore embed expression-breaking content into streamer metadata so that, when uproot generates and invokes the corresponding reader method, attacker-controlled Python expressions are evaluated in the context of the process opening or processing the file. This results in arbitrary Python code execution through maliciously crafted ROOT metadata.
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What an attacker gets, and what they’ve been doing with it.
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Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
8 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.