Medium [CVE-2026-54514] Information Disclosure via Eager DNS Resolution
This medium-severity Red Hat Linux advisory covers CVE-2026-54514 affecting Red Hat build of Quarkus 3.27.4.SP2, Red Hat build of Quarkus 3.33.2.SP2, Cryostat 4.
Aggregated and source-linked by VulniPulse. Data sources, validation and limitations.
VulniPulse record published Record updated
Summary
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. A flaw was found in jackson-databind, a library used for processing JSON data.
This vulnerability allows a remote attacker to force the application to perform an attacker-chosen DNS (Domain Name System) query. This occurs when untrusted JSON input containing specific network address information is processed, potentially leading to the disclosure of sensitive network configuration details.
Moderate: A flaw in `jackson-databind` can lead to information disclosure in Red Hat products that process untrusted JSON input. This eager DNS resolution occurs before application-level validation, potentially revealing internal network configuration details through DNS logs.
Is CVE-2026-54514 exploited?
No exploitation is reported in the sources VulniPulse tracks: CVE-2026-54514 is not in the CISA KEV catalog (checked ) and this advisory does not report exploitation. That is not proof the vulnerability cannot be exploited.
How do I fix CVE-2026-54514?
Upgrade to a fixed release named by Red Hat:
- 2.18.8
- 2.21.4
- 3.1.4
- com.fasterxml.jackson.core/jackson-databind:2.21.4.redhat-00002
- RHSA-2026:36002
- RHSA-2026:36013
Confirm against the vendor advisory before you patch.
Affected versions
No affected-version range was extracted from the source record. The vendor advisory is authoritative. Check it before change work.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
- 2.18.8
- 2.21.4
- 3.1.4
- com.fasterxml.jackson.core/jackson-databind:2.21.4.redhat-00002
- RHSA-2026:36002
- RHSA-2026:36013
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
Mitigation checklist
- Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability.
Official advisory · high-confidence parse· fetched 14 days ago·verify at source
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