Fix CVE-2026-19880 Backport upstream fix 638ffa7: strip path characters from the MDCBasedDiscriminator value so it cannot escape the intended directory via a nested FileAppender path in SiftingAppender. Co-Authored-By: GLM-5.2 (cherry picked from commit 3543d8734b7b6d722c28f22a4c1ac68096fd0df6)
Fix CVE-2026-19880 Backport upstream fix 638ffa7: strip path characters from the MDCBasedDiscriminator value so it cannot escape the intended directory via a nested FileAppender path in SiftingAppender. Co-Authored-By: GLM-5.2 (cherry picked from commit 3543d8734b7b6d722c28f22a4c1ac68096fd0df6)