pybars3 through 0.9.7 and pybars4 through 0.9.13 contain 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.

Metrics

Attack Vector Network

Attack Complexity Low

Privileges Required None

Attack Requirements None

User Interaction None

Vulnerable System Confidentiality Impact High

Vulnerable System Integrity Impact High

Vulnerable System Availability Impact High

Subsequent System Confidentiality Impact None

Subsequent System Integrity Impact None

Subsequent System Availability Impact None

Attack Vector Network

Attack Complexity Low

Privileges Required None

Scope Unchanged

Confidentiality Impact High

Integrity Impact High

Availability Impact High

User Interaction None

No CVSS v3.0

No CVSS v2

This CVE is not in the KEV list.

Key SSVC decision points have not yet been added.

Affected Vendors & Products

Vendors Products
Wbond
  • Pybars3

No data.

No data.

References
Link Providers
https://github.com/up9inc/pybars4 cve-icon cve-icon
https://github.com/up9inc/pybars4/blob/0.9.13/pybars/_compiler.py#L153-L154 cve-icon cve-icon
https://github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/pybars3.md cve-icon cve-icon
https://github.com/wbond/pybars3 cve-icon cve-icon
https://github.com/wbond/pybars3/blob/0.9.7/pybars/_compiler.py#L159-L160 cve-icon cve-icon
https://github.com/wbond/pybars3/issues/88 cve-icon cve-icon
https://www.vulncheck.com/advisories/pybars3-through-0.9.7-code-injection-via-bracketed-path-segments cve-icon cve-icon
History

Mon, 02 Nov 2026 21:00:00 +0000

Type Values Removed Values Added
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. pybars3 through 0.9.7 and pybars4 through 0.9.13 contain 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.
Title pybars3 through 0.9.7 Code Injection via Bracketed Path Segments pybars3 through 0.9.7 and pybars4 through 0.9.13 Code Injection via Bracketed Path Segments
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, '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'}

 cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.3, 'vector': 'CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N'}

Fri, 30 Oct 2026 23:15:00 +0000

Type Values Removed Values Added
First Time appeared Wbond
Wbond pybars3
Vendors & Products Wbond
Wbond pybars3

Fri, 30 Oct 2026 15:30:00 +0000

Type Values Removed Values Added
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.
Title pybars3 through 0.9.7 Code Injection via Bracketed Path Segments
Weaknesses CWE-94
References
Metrics cvssV3_1

{'score': 8.1, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H'}

cvssV4_0

{'score': 9.2, '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'}
cve-icon MITRE

Status: PUBLISHED

Assigner: VulnCheck

Published: 2026-10-30T15:16:14.237Z

Updated: 2026-11-02T20:53:40.920Z

Reserved: 2026-10-30T14:49:27.152Z

Link: CVE-2026-119716

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Deferred

Published: 2026-10-30T16:17:55.013

Modified: 2026-11-02T21:17:28.860

Link: CVE-2026-119716

cve-icon Redhat

No data.