Description
pybars4 through 0.9.13 contains a code injection vulnerability in pybars/_compiler.py that allows attackers to execute Python code via unescaped bracketed path segments in Handlebars templates. Attackers can supply a template with a crafted segment in a helper or block argument to break out of the generated resolve() string literal and execute code in the application process.
References
- www.cve.org/CVERecord ↗
- nvd.nist.gov/vuln/detail/CVE-2026-119717 ↗
- github.com/up9inc/pybars4 ↗
- github.com/up9inc/pybars4/blob/0.9.13/pybars/_compiler.py ↗
- github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/pybars3.md ↗
- www.vulncheck.com/advisories/pybars4-through-0.9.13-code-injection-via-bracketed-path-segments ↗
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This product uses the NVD API but is not endorsed or certified by the NVD. CVSS scores do not establish exploitation.