All vulnerabilities
CVE-2026-116013

OpenResty lua-resty-dns before 0.24 Denial of Service via DNS Response Parsing

openresty lua-resty-dnsRuntimes & languages
Open in ThreatlineRecord JSON
CVSS
6.3Medium
ExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)No scoreNo FIRST EPSS score in this snapshot yet
Fixed in0.24Fixed versionCVE List
Published24 Oct 2026Updated 24 Oct 2026CVE List

What fixes it

A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.

Description

OpenResty lua-resty-dns before 0.24 contains an improper input validation vulnerability in parse_section() and _decode_name() that fails to check resource record lengths against the received message. Attackers controlling or spoofing a queried nameserver can send truncated record headers or RDATA, raising uncaught Lua exceptions in resolver:query() that abort requests and break name resolution.

Text from CVE List

Affected versions 1

  • lua-resty-dnsaffected: all versions before 0.24CVE List

References 5