CVE-2026-119717

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.

CVSS v3 8.1 HIGH

8.1^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.2 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/up9inc/pybars4
https://github.com/up9inc/pybars4/blob/0.9.13/pybars/_compiler.py#L153-L154
https://github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/pybars3.md
https://www.vulncheck.com/advisories/pybars4-through-0.9.13-code-injection-via-bracketed-path-segments

Configurations

No configuration.

History

30 Oct 2026, 16:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-10-30 16:17

Updated : 2026-10-30 19:23

NVD link : CVE-2026-119717

Mitre link : CVE-2026-119717

CVE.ORG link : CVE-2026-119717

JSON object : View

Products Affected

No product.

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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