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CVE-2026-10571

IBM WebSphere Application Server Liberty is affected by a denial of service

MEDIUM
5.3
CVSS Score
Published: August 13, 2026 at 07:30 PM UTC
Updated: August 17, 2026 at 06:45 PM UTC
5 products affected across 1 vendorWebSphere Application ServerWebSphere Application Server LibertyAIX· also runs on 3 platforms

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Severity
MEDIUM5.3
Exploit prediction
EPSS 0.6%
SSVC
No known exploit

Description

IBM WebSphere Application Server - Liberty 17.0.0.3 through 26.0.0.8 is affected by a denial of service caused by insecure deserialization. A low-privileged, administrative user could exploit this vulnerability to consume system resources when the restConnector-2.0 feature is enabled.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

WebSphere Application Server· IBM
95%
17.0.0.3 ≤ v ≤ 26.0.0.817.0.0.3 ≤ v < 26.0.0.917.0.0.326.0.0.8
Affected range stops below 26.0.0.9, so it looks safe — our inference, not a vendor statement
apple-macos (environment) · ibm-aix (environment) · ibm-i (environment) · ibm-z-os (environment) · linux-linux-kernel (environment) · microsoft-windows (environment)
WebSphere Application Server Liberty· IBM
95%
17.0.0.326.0.0.8
AIX· IBMdevice
80%
All versions
I· IBMdevice
80%
All versions
Z /os· IBMdevice
80%
All versions

Runs on — not affected

The affected product only carries this flaw when running on these platforms. The platforms themselves are not vulnerable.

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

Patch and advisory references

References (1)

Vendor AdvisoryPatch
Source: cverecord
https://www.ibm.com/support/pages/node/7283485

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

5.3MEDIUM[email protected]
Attack Vector
NETWORK
Complexity
HIGH
Privileges
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
NONE
Integrity
NONE
Availability
HIGH
Vector?

Quick Info

StatusANALYZED
CWE
CWE-502

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