CVE-2026-71463
Notification template Jinja AST whitelist only inspects static Getattr nodes. Dynamic subscripts (job['job'+'_env']) and {% if job.id > 100 %} conditional gating bypass both the AST check and the test-render (stub has small job.id). At runtime, the gated branch executes and exceptions write full tracebacks into notification body, which is POSTed to attacker-controlled webhook URL. Leaks install paths, Python version, source line numbers.
- Published Sep 23, 2026
- CVSS 2.7 low
- 0.3% chance of exploitation in the next 30 days (EPSS)
- A fix is available