jackson-databind contains the general-purpose data-binding functionality and tree-model for Jackson Data Processor. From 2.0.0 until 2.18.8, 2.21.4, and 3.1.4, JDKFromStringDeserializer constructed InetSocketAddress with new InetSocketAddress(host, port), which performs eager DNS name resolution for hostname inputs at deserialization time. An application that binds untrusted JSON into a type containing an InetSocketAddress field issues an attacker-chosen DNS query during readValue, before any application-level validation or connect logic. The fix uses InetSocketAddress.createUnresolved(host, port), deferring DNS to an explicit connect. This vulnerability is fixed in 2.18.8, 2.21.4, and 3.1.4.
Fix
Patch, vendor advisory and mitigation references on NVD 3
- https://github.com/FasterXML/jackson-databind/commit/1f5a1037b1e9e05920e755cb35f198bcd46667e4 Patch
- https://github.com/FasterXML/jackson-databind/pull/5951 Issue Tracking, Patch
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-hgj6-7826-r7m5 Vendor Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · fasterxmlNVD modified 2026-10-25 23:10
Affected (CPE criteria) 1
cpe:2.3:a:fasterxml:jackson-databind:*:*:*:*:*:*:*:*