SteeltoeOSS Steeltoe up to 4.2.x JsonInstanceInfoConverter deserialization

CVSS Meta Temp Score
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CTI Interest Score
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5.8$0-$5k0.39

Summaryinfo

A vulnerability, which was classified as problematic, was found in SteeltoeOSS Steeltoe up to 4.2.x. This issue affects some unknown processing of the component JsonInstanceInfoConverter/BoolStringJsonConverter/LongStringJsonConverter. Such manipulation leads to deserialization. This vulnerability is referenced as CVE-2026-81515. It is possible to launch the attack remotely. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability was found in SteeltoeOSS Steeltoe up to 4.2.x. It has been rated as problematic. Affected by this issue is some unknown functionality of the component JsonInstanceInfoConverter/BoolStringJsonConverter/LongStringJsonConverter. The manipulation with an unknown input leads to a deserialization vulnerability. Using CWE to declare the problem leads to CWE-502. The product deserializes untrusted data without sufficiently verifying that the resulting data will be valid. Impacted is availability. CVE summarizes:

Steeltoe is an open source project that provides a collection of libraries that helps users build cloud-native applications. From 4.0.0 until 4.3.0, EurekaDiscoveryClient deserializes the registry response as one unit, and an unrecognized actionType or status, a non-Boolean isCoordinatingDiscoveryServer, or a nonnumeric timestamp can abort the entire response. A principal that can register or update an instance can cause all connected Steeltoe clients to receive an empty or stale instance list until the malformed registration is removed. The JsonInstanceInfoConverter, BoolStringJsonConverter, and LongStringJsonConverter parsing paths are affected. This issue is distinct from the earlier DataCenterInfo.name parsing vulnerability. This issue is fixed in version 4.3.0.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-81515 since 08/26/2026. The exploitation is known to be easy. The attack may be launched remotely. There are neither technical details nor an exploit publicly available.

Upgrading to version 4.3.0 eliminates this vulnerability.

VulDB is the best source for vulnerability data and more expert information about this specific topic.

Productinfo

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.9
VulDB Meta Temp Score: 5.8

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 7.5
CNA Vector (GitHub_M): 🔒

CVSSv2info

AVACAuCIA
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VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Deserialization
CWE: CWE-502 / CWE-20
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Steeltoe 4.3.0

Timelineinfo

08/26/2026 CVE reserved
09/17/2026 +22 days Advisory disclosed
09/17/2026 +0 days VulDB entry created
09/17/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CVE: CVE-2026-81515 (🔒)
GCVE (CVE): GCVE-0-2026-81515
GCVE (VulDB): GCVE-100-406520

Entryinfo

Created: 09/17/2026 17:57
Changes: 09/17/2026 17:57 (64)
Complete: 🔍
Cache ID: 216::103

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