Advisories

pybars4 through 0.9.13 Code Injection via Bracketed Path Segments

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Severity
critical
Date
Affecting
  • pybars4 <= 0.9.13

CWE
  • CWE-94 Improper Control of Generation of Code ('Code Injection')
CVSS
9.2
CVSS V4 Vector
CVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N
Credit
Vladislav Korchagin
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.

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