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PatchSiren cyber security CVE debrief

CVE-2026-16881 LY Corporation CVE debrief

A code injection vulnerability exists in the LINE Android app prior to version 26.7.2. The profile rendering component does not adequately validate or sandbox externally supplied script content embedded in profile templates. An attacker who can place crafted content in a profile could cause unintended code to execute with the application's privileges when a victim views that profile. A server-side mitigation has been deployed that also protects existing Android clients that have not been updated to version 26.7.2.

Vendor
LY Corporation
Product
LINE client for Android
CVSS
HIGH 8.7
CISA KEV
Not listed in stored evidence
Original CVE published
2026-08-04
Original CVE updated
2026-08-28
Advisory published
2026-08-04
Advisory updated
2026-08-28

Who should care

Users of the LINE Android app, particularly those with high-risk profiles or sensitive information shared on the platform. Administrators and security teams should prioritize updating the app and monitoring for suspicious activity. They should also review compensating controls for exposed systems while remediation is scheduled and verified. Additionally, they should check relevant monitoring, detection, and logs for exposed assets that need extra review.

Technical summary

The profile rendering component in the LINE Android app prior to version 26.7.2 does not adequately validate or sandbox externally supplied script content embedded in profile templates. This allows an attacker to inject malicious code, which can be executed with the application's privileges when a victim views the profile. The vulnerability has a high CVSS score of 8.7 and is considered High severity. A server-side mitigation has been deployed to protect existing Android clients that have not been updated to version 26.7.2.

Defensive priority

High priority due to high CVSS score and potential for code execution

Recommended defensive actions

  • Update LINE Android app to version 26.7.2 or later
  • Implement server-side mitigation
  • Monitor for suspicious profile activity
  • Perform inventory checks for affected versions
  • Consider compensating controls for unpatched clients

Evidence notes

Evidence from official CVE Program record and NVD vulnerability detail page. Limited information available on affected scope and vendor remediation. The profile rendering component does not adequately validate or sandbox externally supplied script content embedded in profile templates, allowing an attacker to inject malicious code. Defenders should verify profile template validation and sandboxing, review compensating controls, and monitor for suspicious profile activity.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-16881 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-16881

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-16881 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-16881

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental 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.