High severity8.1NVD Advisory· Published Oct 30, 2026

CVE-2026-119716

Description

pybars3 through 0.9.7 contains a code injection vulnerability in pybars/_compiler.py that allows template authors to execute Python code via unescaped bracketed path segments. Attackers can supply Handlebars templates with crafted segments in helper or block arguments to break out of string literals and execute Python in the application process.

Patches

Vulnerability mechanics

References

github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/pybars3.mdnvd
github.com/wbond/pybars3/blob/0.9.7/pybars/_compiler.pynvd
github.com/wbond/pybars3/issues/88nvd
www.vulncheck.com/advisories/pybars3-through-0.9.7-code-injection-via-bracketed-path-segmentsnvd

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