CVE-2026-119717

high

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…

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

8.1

8.1 (CVSS v3.1)

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H

Severity source: NVD CVSS v3.1 (disclosure@vulncheck.com)

Timeline (UTC)

Published: 2026-10-30 16:17

Modified: 2026-10-30 19:23

NVD status: Deferred

Last synced 17 hours ago

Verified against the source API 2026-10-30 19:54 UTC

Exploitation

Not listed in CISA KEV (as of last catalog sync)

Absence from KEV does not mean a CVE is not exploited. Exploitation status: unknown (no authoritative evidence in our sources).

Affected products

Not reported by the source (unknown — not "none").

Weakness classification (CWE)

CWE-94

Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.

Mitigation & advisories

No vendor advisory or patch reference tagged by NVD. Check the references below.

References

https://github.com/up9inc/pybars4 disclosure@vulncheck.com
https://github.com/up9inc/pybars4/blob/0.9.13/pybars/_compiler.py#L153-L154 disclosure@vulncheck.com
https://github.com/vladko312/advisories/blob/702e98db9642ece70d9e2150076d8014ffec2db3/pyba... disclosure@vulncheck.com
https://www.vulncheck.com/advisories/pybars4-through-0.9.13-code-injection-via-bracketed-p... disclosure@vulncheck.com

Data sources

NVD CVE API 2.0 — fetched 2026-10-30 19:54 UTC · record ↗

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