Race Condition Affecting github.com/xyproto/algernon/lua/upload package, versions <1.17.6
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-GOLANG-GITHUBCOMXYPROTOALGERNONLUAUPLOAD-17116878
- published1 Jun 2026
- disclosed26 May 2026
- creditKatrielMoses
Introduced: 26 May 2026
CVE-2026-43981 Â (opens in a new tab)How to fix?
Upgrade github.com/xyproto/algernon/lua/upload to version 1.17.6 or higher.
Overview
Affected versions of this package are vulnerable to Race Condition in the handle process due to the sync.RWMutex being released before L.Push() and L.PCall() execute. An attacker can cause Lua VM corruption or unpredictable server behavior by making concurrent requests that race on the shared LState.