CVE-2026-71464

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CVE-2026-71464
LaunchConfigurationBaseSerializer.scm_branch has no
validate_scm_branch() leading-dash check, unlike
Project/JobTemplate/JobLaunch serializers. Schedule and
WFJT Node accept --upload-pack=/bin/id as scm_branch.
Currently blocked at runtime by jobs.py:1502 ValueError
check (defense-in-depth), but the API validation gap
means sole reliance on a task-layer guard. Refactoring
that guard away would promote this to RCE.