Vulnerability in Openresty Lua-Resty-Dns
CVE-2026-116013
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.
Published .
CVSS v3 metric
CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
Weakness classification (CWE)
References
- github.com/openresty/lua-resty-dns/pull/83 (issue-tracking, patch)
- github.com/openresty/lua-resty-dns/commit/b68eaecbf7997ac71c08ba56032b1f45438bd… (patch)
- github.com/openresty/lua-resty-dns/blob/v0.23/lib/resty/dns/resolver.lua (technical-description)
- github.com/openresty/lua-resty-dns/tree/v0.24 (release-notes)
- www.vulncheck.com/advisories/openresty-lua-resty-dns-before-0.24-denial-of-serv… (third-party-advisory)
Frequently asked questions
- What is CVE-2026-116013?
- CVE-2026-116013 is a low-severity vulnerability in Openresty Lua-Resty-Dns, classified under Improper Handling of Length Parameter Inconsistency. CVSS score: 3.7/10. Published 2026-10-24.
- How severe is CVE-2026-116013?
- Low severity. CVSS v3 base score is 3.7 out of 10.