CVE-2026-105114 OpenIdentityPlatform CVE debrief

Who should care

Defenders responsible for OpenAM instances should assess exposure and prioritize verification and remediation efforts. This includes reviewing OAuth2 authorization error page parameter encoding and implementing additional security measures to prevent cross-site scripting attacks. Defenders should also verify OpenAM instances are running version 16.1.3 or later and track exceptions, retest remediated assets, and close the item only after evidence is

Why it matters

CVE-2026-105114 is a reflected cross-site scripting vulnerability in OpenAM before 16.1.3 that allows unauthenticated attackers to inject script by supplying crafted parameters rendered unencoded on the OAuth2 authorization error page. Defenders responsible for OpenAM instances should assess exposure and prioritize verification and remediation.

• Defenders must verify OpenAM instances are running version 16.1.3 or later to prevent exploitation
• Defenders should review OAuth2 authorization error page parameter encoding to prevent cross-site scripting attacks
• Defenders may need to implement additional security measures to prevent cross-site scripting attacks

Technical summary

The vulnerability allows unauthenticated attackers to inject script by supplying crafted parameters rendered unencoded on the OAuth2 authorization error page. Attackers can lure victims to a crafted /oauth2/authorize link with repeated parameters to run JavaScript in the OpenAM origin, acting within existing sessions or redirecting to phishing pages. This is a reflected cross-site scripting vulnerability in OpenAM before 16.1.3. The vulnerability has a CVSS score of 5.3 and is classified as MEDIUM severity. Defenders should prioritize verifying and updating OpenAM instances to version 16.1.3 or later.

Defensive priority

Defenders should prioritize verifying and updating OpenAM instances to version 16.1.3 or later.

Recommended defensive actions

• Verify OpenAM instances are running version 16.1.3 or later
• Review OAuth2 authorization error page parameter encoding
• Implement additional security measures to prevent cross-site scripting attacks
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented
• Confirm whether affected product deployments exist in managed environments and assign an owner for follow-up
• Review the supplied official advisory or CVE record to validate affected scope, severity, and vendor guidance

Evidence notes

The CVE record and NVD entry provide details on the vulnerability, but do not specify which versions are affected or provide remediation steps. The vulnerability is a reflected cross-site scripting issue in OpenAM before 16.1.3. The CVE record was published on 2026-10-03T14:16:37.963Z and has not been modified since then. The NVD entry provides additional information on the vulnerability, including its CVSS score and severity.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.