jackson-databind: InetSocketAddress deserialization triggers eager DNS resolution (SSRF)
Summary
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.
Impact
An attacker controlling JSON deserialized into an InetSocketAddress-bearing type can force outbound DNS lookups for attacker-chosen hostnames at deserialization time (SSRF / DNS-based out-of-band interaction / internal-resolver probing), purely from binding.
Affected / Patched (verified via git tag --contains on 1f5a103)
- 2.18 line:
>= 2.18.0, < 2.18.8-> fixed in 2.18.8 - 2.19-2.21 line:
>= 2.19.0, < 2.21.4-> fixed in 2.21.4 - 3.x line:
>= 3.0.0, < 3.1.4-> fixed in 3.1.4
Severity / CWE
Maintainer: minor. Reporter: LOW. CWE-918 (SSRF).
Upstream fix
FasterXML/jackson-databind#5951 ("Improve InetSocketAddress deserialization"). Released 2026-06-04 in 2.18.8 / 2.21.4 / 3.1.4.
Credits
Omkhar Arasaratnam (@omkhar) - finder.
Software afectado
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| Plataforma | Paquete | Versiones vulnerables | Corregida en |
|---|---|---|---|
| Java / Kotlin (Maven) | com.fasterxml.jackson.core:jackson-databind | >= 2.0.0, < 2.18.8, >= 2.19.0, < 2.21.4, >= 3.0.0, < 3.1.4 | 2.18.8, 2.21.4, 3.1.4 |
| Java / Kotlin (Maven) | tools.jackson.core:jackson-databind | >= 2.19.0, < 2.21.4, >= 3.0.0, < 3.1.4 | 2.21.4, 3.1.4 |
Referencias
- https://github.com/FasterXML/jackson-databind/security/advisories/GHSA-hgj6-7826-r7m5
- https://nvd.nist.gov/vuln/detail/CVE-2026-54514
- https://github.com/FasterXML/jackson-databind/pull/5951
- https://github.com/FasterXML/jackson-databind/commit/1f5a1037b1e9e05920e755cb35f198bcd46667e4
- https://github.com/FasterXML/jackson-databind
- Vector CVSS
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N- Debilidad (CWE)
CWE-918- Plataforma
- Java / Kotlin (Maven)
- Paquete
com.fasterxml.jackson.core:jackson-databind, tools.jackson.core:jackson-databind- Publicada
- 23.06.2026
- Actualizado
- 11.10.2026 13:20
Fuentes y licencias
OSV / GitHub Advisory Database - GHSA-hgj6-7826-r7m5 - CC BY 4.0
Historial de vulnerabilidades: tools.jackson.core:jackson-databind
Todas las vulnerabilidades publicadas de este paquete (Java / Kotlin (Maven)), de la más reciente a la más antigua. Muestra si es un fallo aislado o un paquete que hay que vigilar.
- Entradas en total
- 15
- Primera → última
- 06.2026 09.2026
- Sin corrección
- 0
- Explotada en ataques
- 0
Distribución por gravedad
- Alta 5
- Media 10
Divulgaciones por año
- 2026: 15
-
jackson-databind: InetSocketAddress deserialization triggers eager DNS resolution (SSRF) esta entrada
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