CVE-2026-119716 pybars3 through 0.9.7 and pybars4 through 0.9.13 Code Injection via Bracketed Path Segments
Critical 9.3
Published
Updated
Check this codebase for CVE-2026-119716 and fix it if it is affected.
What it is: CVE-2026-119716 is a critical vulnerability in up9inc pybars3, published on 30 Oct 2026.
Exploitation: It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119716 exists.
Affected product: up9inc pybars3. No package-level version data is available, so check the vendor advisory linked from the reference page.
Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.
Reference: https://insights.sbomify.com/CVE-2026-119716/ (Markdown: https://insights.sbomify.com/CVE-2026-119716/index.md)
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-119716?
CVE-2026-119716 is a critical vulnerability in up9inc pybars3, published on 30 Oct 2026.
Official description
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.
Weakness: CWE-94
Which versions are affected by CVE-2026-119716?
Linux distribution packages (1)
python-pybars3 openSUSE:Tumbleweed | All versions | 0.9.7-3.1 |
How do I fix CVE-2026-119716?
Upgrade to a fixed version.
Is CVE-2026-119716 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-119716 exists.
Sources
Also known as GHSA-xvx4-89q3-mchg, openSUSE-SU-2026:12503-1.