diff --git a/strix/skills/vulnerabilities/idor.md b/strix/skills/vulnerabilities/idor.md
index 03de216..6c098b8 100644
--- a/strix/skills/vulnerabilities/idor.md
+++ b/strix/skills/vulnerabilities/idor.md
@@ -187,6 +187,7 @@ query IDOR {
 - Soft-privatized data where content is already public
 - Idempotent metadata lookups that do not reveal sensitive content
 - Correct row-level checks enforced across all channels
+- Empty array / null returned for another user's resource — silent enforcement, not exposure; compare against the owner's view to confirm the data is actually missing rather than just hidden from the response shape
 
 ## Impact
 
diff --git a/strix/skills/vulnerabilities/ssrf.md b/strix/skills/vulnerabilities/ssrf.md
index e3570d7..d1618b7 100644
--- a/strix/skills/vulnerabilities/ssrf.md
+++ b/strix/skills/vulnerabilities/ssrf.md
@@ -157,6 +157,7 @@ Server-Side Request Forgery enables the server to reach networks and services th
 - Strict allowlists with DNS pinning and no redirect following
 - SSRF simulators/mocks returning canned responses without real egress
 - Blocked egress confirmed by uniform errors across all targets and protocols
+- OAST callbacks where the source IP matches the tester's machine, not the server — the browser or a client-side fetch made the request, not the backend
 
 ## Impact