CVE-2026-54514 is a medium-severity server-side request forgery (SSRF) vulnerability in com.fasterxml.jackson.core:jackson-databind (maven), affecting versions >= 2.0.0, < 2.18.8. It is fixed in 2.18.8, 2.21.4, 3.1.4.
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.
Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside. Typical impact: access to internal metadata services, internal APIs, or cloud credentials.
CVE-2026-54514 has a CVSS score of 5.3 (Medium). The vector is network-reachable, no privileges required, and no user interaction. A CVSS score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether this affects your application depends on whether the vulnerable code is present and reachable in your environment.
A fixed version is available (2.18.8, 2.21.4, 3.1.4). Upgrading removes the vulnerable code path.
maven
com.fasterxml.jackson.core:jackson-databind (>= 2.0.0, < 2.18.8)com.fasterxml.jackson.core:jackson-databind (>= 2.19.0, < 2.21.4)com.fasterxml.jackson.core:jackson-databind (>= 3.0.0, < 3.1.4)tools.jackson.core:jackson-databind (>= 2.19.0, < 2.21.4)tools.jackson.core:jackson-databind (>= 3.0.0, < 3.1.4)com.fasterxml.jackson.core:jackson-databind → 2.18.8 (maven)com.fasterxml.jackson.core:jackson-databind → 2.21.4 (maven)com.fasterxml.jackson.core:jackson-databind → 3.1.4 (maven)tools.jackson.core:jackson-databind → 2.21.4 (maven)tools.jackson.core:jackson-databind → 3.1.4 (maven)Severity tells you how bad this could be in the worst case. It does not tell you whether you are exposed. Exploitability and impact are functions of runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A vulnerable package can sit in your dependency tree and never run.
Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter instead of chasing every advisory.
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Already deployed Kodem? See CVE-2026-54514 in your environment →Upgrade the following packages to resolve this vulnerability:
com.fasterxml.jackson.core:jackson-databind to 2.18.8 or latercom.fasterxml.jackson.core:jackson-databind to 2.21.4 or latercom.fasterxml.jackson.core:jackson-databind to 3.1.4 or latertools.jackson.core:jackson-databind to 2.21.4 or latertools.jackson.core:jackson-databind to 3.1.4 or laterKodem Kai can prioritize this vulnerability in your dependency tree and generate a fix recommendation.
CVE-2026-54514 is a medium-severity server-side request forgery (SSRF) vulnerability in com.fasterxml.jackson.core:jackson-databind (maven), affecting versions >= 2.0.0, < 2.18.8. It is fixed in 2.18.8, 2.21.4, 3.1.4. Untrusted input controls the target URL of a server-initiated request, which may reach internal services not otherwise accessible from outside.
CVE-2026-54514 has a CVSS score of 5.3 (Medium). This score reflects the worst-case severity of the vulnerability, not your specific exposure. Whether it represents real risk in your environment depends on whether the vulnerable code is present and reachable.
com.fasterxml.jackson.core:jackson-databind (maven) (versions >= 2.0.0, < 2.18.8)tools.jackson.core:jackson-databind (maven) (versions >= 2.19.0, < 2.21.4)Yes. CVE-2026-54514 is fixed in 2.18.8, 2.21.4, 3.1.4. Upgrade to this version or later.
Whether CVE-2026-54514 is exploitable in your environment depends on whether the vulnerable code is present and reachable. A CVSS score is a worst-case rating; it does not account for your specific deployment, configuration, or usage patterns. Kodem, an Intelligent Application Security platform, uses runtime intelligence to show which vulnerabilities actually execute in production, so you can focus on the ones that represent real risk. Get a demo
Exploitability and impact are not fixed properties of a CVE. They depend on runtime truth: whether the vulnerable code is present, reachable, and actually executes in your application. A high CVSS score on a dependency that never runs is not the same as real risk. Kodem, an Intelligent Application Security platform, uses runtime intelligence to reveal which vulnerabilities actually execute in production, so teams prioritize the ones that genuinely matter.
com.fasterxml.jackson.core:jackson-databind to 2.18.8 or latercom.fasterxml.jackson.core:jackson-databind to 2.21.4 or latercom.fasterxml.jackson.core:jackson-databind to 3.1.4 or latertools.jackson.core:jackson-databind to 2.21.4 or latertools.jackson.core:jackson-databind to 3.1.4 or later