diff --git a/.jules/sentinel.md b/.jules/sentinel.md
index 79ae60e..9f9d56d 100644
--- a/.jules/sentinel.md
+++ b/.jules/sentinel.md
@@ -14,3 +14,8 @@
 **Vulnerability:** A script created temporary files at predictable paths (`/tmp/wiki_claude_{session_id}.txt`) allowing potential local attackers to execute a symlink attack or view sensitive session content.
 **Learning:** Hardcoded predictable temporary file paths, especially those derived from predictable elements like session_ids, expose local file operations to race conditions.
 **Prevention:** Always use secure temporary file creation APIs like Python's `tempfile.NamedTemporaryFile` or Bash's `mktemp`, and pass the dynamically generated file path between components rather than assuming predictable names.
+
+## 2025-02-27 - SQL Injection in Daily Digest script
+**Vulnerability:** SQL injection vulnerabilities were present in `bin/wiki-daily-digest` where externally supplied variables (`$session_id` and `$date`) were directly interpolated into `sqlite3` string queries without proper sanitization.
+**Learning:** Internal tools that process externally populated databases (like SQLite) are still susceptible to SQL injection if string interpolation is used instead of parameterization or strict sanitization.
+**Prevention:** Always use safe parameter expansion (e.g. `${var//\'/\'\'}`) when interpolating Bash variables into SQLite queries to correctly escape single quotes, even in scripts not directly facing the public network.
diff --git a/bin/wiki-daily-digest b/bin/wiki-daily-digest
index 24fbb7d..aa149f9 100755
--- a/bin/wiki-daily-digest
+++ b/bin/wiki-daily-digest
@@ -139,7 +139,7 @@ _extract_session_content() {
 SELECT json_extract(p.data, '$.text')
 FROM part p
 JOIN message m ON p.message_id = m.id
-WHERE m.session_id = '$session_id'
+WHERE m.session_id = '${session_id//\'/\'\'}'
   AND json_extract(m.data, '$.role') = 'assistant'
   AND json_extract(p.data, '$.type') = 'text'
   AND length(json_extract(p.data, '$.text')) > 20
@@ -162,7 +162,7 @@ SELECT
   s.created_at,
   s.updated_at
 FROM sessions s
-WHERE date(s.updated_at) = '$date'
+WHERE date(s.updated_at) = '${date//\'/\'\'}'
 ORDER BY s.created_at ASC;" 2>/dev/null
 }
 
@@ -175,7 +175,7 @@ _extract_goose_content() {
   content="$(sqlite3 "$GOOSE_DB" "
 SELECT substr(m.content_json, 1, 2000)
 FROM messages m
-WHERE m.session_id = '$session_id'
+WHERE m.session_id = '${session_id//\'/\'\'}'
   AND m.role = 'assistant'
 ORDER BY m.created_at ASC;" 2>/dev/null | python3 -c "
 import sys, json