CVE-2026-116013 json
OpenResty lua-resty-dns before 0.24 Denial of Service via DNS Response Parsing
published 2026-10-24 15 d ago modified 2026-10-29 10 d ago also EUVD-2026-109271
- cvss
- 3.7
- version 3.1, CNA
- cisa kev
- Not listed
- not in CISA's catalog
- epss
- 0.3%
- EPSS 0.3% chance of exploitation in 30 days, percentile 21%
- public exploits
- 0
- none known
Summary
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.
Patch / fix
- openresty lua-resty-dns 0.24
- github.com/openresty/lua-resty-dns@b68eaec commit
- github.com/openresty/lua-resty-dns#83 pull request
CISA SSVC
- Exploitation
- none
- Automatable
- no
- Technical impact
- partial
- Assessed
- 10 d ago
Exploit prediction
0.29% chance of exploitation in the next 30 days, higher than 21% of all scored CVEs (FIRST EPSS, 2026-11-08).
CVSS scores
| assigned by | version | score | vector |
|---|---|---|---|
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N |
| CNA | 3.1 | 3.7 | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L |
| CNA | 4.0 | 6.3 | CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X |
Affected products
- openresty lua-resty-dns
Classification
- Weakness
-
- CWE-130 Improper Handling of Length Parameter Inconsistency
References
-
github.com
/openresty/lua-resty-dns/pull/83
patch, issue-tracking
-
github.com
/openresty/lua-resty-dns/commit/b68eaecbf7997ac71c08ba56032b1f45438bd758
patch
-
github.com
/openresty/lua-resty-dns/blob/v0.23/lib/resty/dns/resolver.lua#L396-L442
technical-description
-
github.com
/openresty/lua-resty-dns/tree/v0.24
release-notes
-
vulncheck.com
/advisories/openresty-lua-resty-dns-before-0.24-denial-of-service-via-dns-response-parsing
third-party-advisory
Sources
- CVE List CVE-2026-116013
- NVD CVE-2026-116013
Fencer Vulns keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.