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CVE-2026-116013medium6.3

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

Impact

OpenResty lua-resty-dns before 0.24 has an improper input validation vulnerability, allowing attackers to send truncated DNS records and cause a denial of service. This occurs when an attacker controls or spoofs a queried nameserver. The impact is aborted requests and broken name resolution.

Summarized by @cf/meta/llama-3.3-70b-instruct-fp8-fast. Verify details against the original sources.

Affected packages

This source has no supported package-version data for matching. You can read the advisory here, but this record alone cannot power a dependency check.

Affected products

Vendor version evidence. Product records are separate from automatic dependency matching.

openresty · VulnCheck

lua-resty-dns

1 range
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affected

0 → before 0.24

custom versions

unaffected

unknown

Other versions: unaffected

Original source 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.

Inside the record

Evidence available

Package identity · not supplied
Version evidence
Remediation guidance · not supplied
Weakness classification
Additional publishers

Describes the evidence in this view, not whether the product is safe.

Original records

CVE-2026-116013

View the latest unmodified CVE JSON from the official source. It may be newer than this imported page.

cve.new JSON →

Underlying weaknesses

The source’s classification of what caused the vulnerability.

CWE-130 ↗

Improper Handling of Length Parameter Inconsistency

VulnCheck

Related →
Contributing organizations · 2
VulnCheck

Assigning organization

2026-10-24
CISA-ADP

Additional data publisher

2026-10-29

What changed

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References

5 sources
github.com/openresty/lua-resty-dns/pull/83
patchVulnCheck
github.com/openresty/lua-resty-dns/commit/b68eaecbf7997ac71c08ba56032b1f45438bd758
patchVulnCheck
github.com/openresty/lua-resty-dns/blob/v0.23/lib/resty/dns/resolver.lua
technical-descriptionVulnCheck
github.com/openresty/lua-resty-dns/tree/v0.24
release-notesVulnCheck
www.vulncheck.com/advisories/openresty-lua-resty-dns-before-0.24-denial-of-service-via-dns-response-parsing
third-party-advisoryVulnCheck