CVE-2026-10571

Service interruption via insecure administrative deserialization

Published Aug 13, 2026 · Updated Aug 13, 2026

Insecure deserialization in IBM WebSphere Liberty 17.0.0.3 through 26.0.0.8 allows remote authenticated users to exhaust resources. The restConnector-2.0 feature deserializes untrusted administrative input in a way that consumes system resources; IBM has not disclosed the affected class or payload. Exploitation requires low-privileged administrative credentials and the feature to be enabled; the documented consequence is service interruption through resource exhaustion.

CVSS severity5.7
Medium
EPSS probability0.27%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Insecure deserialization in IBM WebSphere Liberty 17.0.0.3 through 26.0.0.8 allows remote authenticated users to exhaust resources. The restConnector-2.0 feature deserializes untrusted administrative input in a way that consumes system resources; IBM has not disclosed the affected class or payload. Exploitation requires low-privileged administrative credentials and the feature to be enabled; the documented consequence is service interruption through resource exhaustion.

The record

CVE
CVE-2026-10571
Published
Aug 13, 2026
Updated
Aug 13, 2026
Vendor
IBM
Product
IBM WebSphere Application Server Liberty
Classifications
CWE-502, T1499.004
Attack vector
adjacent
Privileges
admin

Timeline

How it unfolded

  1. Aug 13, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 13, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=17.0.0.3 <=26.0.0.8

What conditions does exploitation require?

Attack vectoradjacent
Required privilegesadmin

What is affected?

IBM · IBM WebSphere Application Server Libertyversion=17.0.0.3 <=26.0.0.8

Published CVSS scores

5.3NVDCVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H
5.7IBMCVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectoradjacent
Privilegesadmin
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-502Deserialization of Untrusted Data
T1499.004Application or System Exploitation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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