Triage of all 9 CodeQL alerts surfaced on main by #1223. None were introduced by that PR.
Fixed: the compliance-review artifact now unpacks to runner.temp instead of over the trusted checkout (actions/artifact-poisoning, critical); MCP LIKE patterns escape backslash first, which was a real correctness bug returning wrong rows for any search containing a backslash (js/incomplete-sanitization, 2 sites); and the mcp-oauth consent form action is HTML-escaped (js/reflected-xss, not exploitable because WHATWG URL already percent-encodes " < >, but & is not in that encode set).
Dismissed as false positives with reasoning recorded at each site and in DECISIONS.md: sie-export escapeQuotes, where doubling backslashes would violate SIE 4B, corrupt files in conformant readers and skew #KSUMMA under BFL 7-year retention; hashApiKey, where SHA-256 is correct for a 256-bit CSPRNG token and changing it would invalidate every live gnubok_sk_ key; and the DuplicateBookingDialog href, which is a DB UUID behind a literal path prefix.
Regression tests cover both behavioural fixes, including the escape ordering.
Jakob Wennberg
7dde8cac82