CVE•Published 2026-05-26•Modified 2026-05-26•0 articles on news•5 live references•NVD data
CVE-2026-43981
Vulnerability data via NVD (ingested)
CVSS v3.1
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EPSS percentile
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Weaknesses (CWE)
Description
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.
Timeline
Published 2026-05-26
Modified 2026-05-26
External references
Search for exposed instances
Shodan + Censys queries derived from NVD's CPE data. The vuln tag catches assets Shodan has explicitly linked to this CVE; the product / banner fingerprints find exposed instances even when the vuln tag was never applied (which is common).
More intel sources (5)
Shodan report
vuln:CVE-2026-43981Country / ASN / product breakdown for the vuln query.
Censys
vulnerabilities.cve_id: CVE-2026-43981Censys host search filtered to this CVE id.
grep.app
CVE-2026-43981Public source-code mentions — fast PoC discovery.
GitHub code
CVE-2026-43981GitHub code search for direct mentions.
Google dork
"CVE-2026-43981" exploit -site:nvd.nist.govWrite-ups and news, NVD excluded.
Known PoCs on GitHub (2)
We haven't classified any articles referencing CVE-2026-43981 yet. The external references above still apply.