CVE-2026-10571: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server - Liberty
IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.8 contain a vulnerability involving insecure deserialization that can be exploited by a low-privileged administrative user to cause a denial of service. This occurs when the restConnector-2.0 feature is enabled, allowing resource exhaustion. The vulnerability has a medium severity rating with a CVSS score of 5.7.
AI Analysis
Technical Summary
CVE-2026-10571 is a vulnerability in IBM WebSphere Application Server - Liberty affecting versions 17.0.0.3 through 26.0.0.8. It involves CWE-502, insecure deserialization of untrusted data, which can be exploited by a low-privileged administrative user to cause denial of service by consuming system resources. The vulnerability requires the restConnector-2.0 feature to be enabled for exploitation. The CVSS 3.1 base score is 5.7, reflecting a medium severity with attack vector as adjacent network, low attack complexity, low privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation allows a low-privileged administrative user to cause denial of service by exhausting system resources, impacting availability of the affected IBM WebSphere Application Server - Liberty instances when the restConnector-2.0 feature is enabled. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or remediation level has been published as of the data provided. Until a patch is available, consider disabling the restConnector-2.0 feature if it is not required to reduce exposure.
CVE-2026-10571: CWE-502 Deserialization of Untrusted Data in IBM WebSphere Application Server - Liberty
Description
IBM WebSphere Application Server - Liberty versions 17.0.0.3 through 26.0.0.8 contain a vulnerability involving insecure deserialization that can be exploited by a low-privileged administrative user to cause a denial of service. This occurs when the restConnector-2.0 feature is enabled, allowing resource exhaustion. The vulnerability has a medium severity rating with a CVSS score of 5.7.
CVSS v3.1
Score 5.7medium
Affected software
pkg:maven/com.ibm.websphere/websphere-application-server-libertycpe:2.3:a:ibm:websphere_application_server_liberty:17.0.0.3:*:*:*:*:*:*:*cpe:2.3:a:ibm:websphere_application_server_liberty:26.0.0.8:*:*:*:*:*:*:*Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
CVE-2026-10571 is a vulnerability in IBM WebSphere Application Server - Liberty affecting versions 17.0.0.3 through 26.0.0.8. It involves CWE-502, insecure deserialization of untrusted data, which can be exploited by a low-privileged administrative user to cause denial of service by consuming system resources. The vulnerability requires the restConnector-2.0 feature to be enabled for exploitation. The CVSS 3.1 base score is 5.7, reflecting a medium severity with attack vector as adjacent network, low attack complexity, low privileges required, no user interaction, and impact limited to availability.
Potential Impact
Successful exploitation allows a low-privileged administrative user to cause denial of service by exhausting system resources, impacting availability of the affected IBM WebSphere Application Server - Liberty instances when the restConnector-2.0 feature is enabled. There is no impact on confidentiality or integrity.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. No official fix or remediation level has been published as of the data provided. Until a patch is available, consider disabling the restConnector-2.0 feature if it is not required to reduce exposure.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- ibm
- Date Reserved
- 2026-06-01T16:53:37.814Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
Threat ID: 6a7e217bbf8831d539ba0cc9
Added to database: 08/13/2026, 19:56:43 UTC
Last enriched: 08/13/2026, 20:12:37 UTC
Last updated: 08/14/2026, 00:26:55 UTC
Views: 4
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