RCE in Wbond Pybars3
CVE-2026-119716
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.
Vulnerability class: RCE (Remote Code Execution)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 8.1 (High). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/wbond/pybars3/issues/88 (issue-tracking)
- github.com/wbond/pybars3 (product)
- github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/p… (third-party-advisory)
- github.com/wbond/pybars3/blob/0.9.7/pybars/_compiler.py (technical-description)
- www.vulncheck.com/advisories/pybars3-through-0.9.7-code-injection-via-bracketed… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-119716?
- CVE-2026-119716 is a high-severity vulnerability in Wbond Pybars3, classified under Code Injection. CVSS score: 8.1/10. Published 2026-10-30.
- How severe is CVE-2026-119716?
- High severity. CVSS v3 base score is 8.1 out of 10.