Advisories

pybars3 through 0.9.7 Code Injection via Bracketed Path Segments

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Severity
critical
Date
Affecting
  • pybars3 <= 0.9.7

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
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.

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