high8.2
CVE-2026-43981
Algernon is a small self-contained pure-Go web server.
Impact
Algernon is a small self-contained pure-Go web server. Prior to 1.17.6, in engine/luahandler.go, the sync.RWMutex protecting LoadCommonFunctions is released before L.Push() and L.PCall() execute. Since gopher-lua's LState is explicitly not goroutine-safe, concurrent requests race on the shared state causing Lua VM corruption. The Go race detector confirms this immediately under modest concurrency (ab -n 1000 -c 100). This vulnerability is fixed in 1.17.6.
Affected products
| Product | Affected versions |
|---|---|
| Algernon Is A Small Self-Contained Pure-Go Web Server. | before 1.17.6 |
Versions were read from the advisory text. No structured product data has been published for this record yet.