Low severity · published Oct 24, 2026
CVE-2026-116013
OpenResty lua-resty-dns before 0.24 Denial of Service via DNS Response Parsing
New
3.7
CVSS
0.3%
EPSS
No
On KEV
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.
CVSS vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L
Attack vector
Network
Complexity
High
Privileges
None
User interaction
None
Confidentiality
None
Integrity
None
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.3% · higher than 21% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
LU
lua-resty-dns · openresty
before 0.24 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-116013
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-116013
github.com
https://github.com/openresty/lua-resty-dns/blob/v0.23/lib/resty/dns/resolver.lua#L396-L442
github.com
https://github.com/openresty/lua-resty-dns/commit/b68eaecbf7997ac71c08ba56032b1f45438bd758
github.com
https://github.com/openresty/lua-resty-dns/pull/83
github.com
https://github.com/openresty/lua-resty-dns/tree/v0.24
www.vulncheck.com
https://www.vulncheck.com/advisories/openresty-lua-resty-dns-before-0.24-denial-of-service-via-dns-response-parsing