CVE-2026-116013

LOW 3.7

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

CVSS Score

3.7

EPSS Score

0.0%

EPSS Percentile

0th

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.

CWE	CWE-130
Vendor	openresty
Product	lua-resty-dns
Published	Oct 24, 2026

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CVSS v3 Breakdown

CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L

Attack Vector

Network

Attack Complexity

High

Privileges Required

None

User Interaction

None

Scope

Unchanged

Confidentiality

None

Integrity

None

Availability

Low

Affected Versions

openresty / lua-resty-dns

0 < 0.24

References

NVD ↗ CVE.org ↗ EPSS Data ↗

github.com: https://github.com/openresty/lua-resty-dns/pull/83 github.com: https://github.com/openresty/lua-resty-dns/commit/b68eaecbf7997ac71c08ba56032b1f45438bd758 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/tree/v0.24 vulncheck.com: https://www.vulncheck.com/advisories/openresty-lua-resty-dns-before-0.24-denial-of-service-via-dns-response-parsing

Credits

Siyang Wu