CVE-2026-49510: Integer Overflow in Samsung rlottie Animation Library

Technical summary

CVE-2026-49510 is an integer overflow or wraparound flaw (CWE-190) in Samsung's rlottie library prior to commit 21292665023e5074b38254432716866d00f1985f. The vulnerability arises from insufficient bounds checking on integer operations during animation parsing or rendering. When an integer value exceeds its maximum representable size, it wraps around to an unexpectedly low value, potentially bypassing safety checks or causing heap corruption. The attack vector is local and requires user interaction—an attacker must convince a user to open a malicious .lottie or animation file.

Business impact

Organizations integrating rlottie into applications face availability and integrity risks. End-user applications—such as design tools, messaging clients, or media players that render Lottie animations—could crash unexpectedly or experience undefined behavior. While confidentiality impact is not expected, application instability and denial of service can disrupt workflows and erode user trust. The requirement for user interaction limits mass exploitation but does not eliminate risk in environments where animation files are commonly shared or auto-loaded.

Affected systems

Any application or service that bundles or uses Samsung's rlottie library in versions prior to commit 21292665023e5074b38254432716866d00f1985f is potentially affected. This includes mobile apps (iOS and Android), desktop applications, web-based animation renderers, and development tools that depend on rlottie for Lottie animation support. Verify your supply chain and dependencies to determine if your codebase includes this library.

Exploitability

Exploitation requires local file system access and user interaction—an attacker must craft a malicious animation file and persuade or trick a user into opening it within an application using the vulnerable rlottie version. This is not a remote code execution vector and does not permit privilege escalation. The CVSS:3.1 score of 6.1 (MEDIUM) reflects the combination of local-only attack vector, required user interaction, and limited but real impact (integrity and availability). Automated or widespread exploitation is unlikely without social engineering.

Remediation

Immediately identify all applications and libraries in your environment that depend on rlottie. Update to a version that includes commit 21292665023e5074b38254432716866d00f1985f or later. Samsung's upstream repository should be consulted for official release versions that incorporate this fix. Test updated applications thoroughly before production deployment to ensure compatibility and that animation rendering continues to work as expected.

Patch guidance

Consult Samsung's official rlottie repository and release notes to identify the first stable release incorporating the security fix (commit 21292665023e5074b38254432716866d00f1985f or later). If you maintain applications that embed rlottie, retrieve the patched source and rebuild your application. Coordinate updates with your supply chain and notify users when application updates are available. Test rendering of both trusted and edge-case animation files to confirm the fix does not introduce regressions.

Detection guidance

Audit your software bill of materials (SBOM) and dependency manifests (package.json, Gemfile, requirements.txt, gradle files, etc.) to identify rlottie references and version information. Review application logs for crashes or exceptions during animation rendering, particularly if correlated with user reports of malformed or suspicious animation files. Consider deploying file integrity monitoring on systems where untrusted animation files are regularly processed. Monitor for social engineering attempts that may distribute malicious .lottie files targeting your user base.

Why prioritize this

While the CVSS score is MEDIUM (6.1), this vulnerability warrants prompt but not emergency action. The requirement for user interaction and local access limits immediate risk, and there is no evidence of active exploitation. However, the widespread adoption of animation libraries in modern applications and the ease of distribution through social channels mean organizations should not delay patching. Prioritize based on whether your applications directly accept user-supplied animation files or render animations from untrusted sources.

Risk score, explained

The CVSS:3.1 score of 6.1 reflects: Attack Vector (Local)—requires presence on the system; Attack Complexity (Low)—no special conditions needed beyond user interaction; Privileges Required (None)—any user can trigger the flaw; User Interaction (Required)—the user must open a malicious file; Scope (Unchanged)—impact is limited to the vulnerable component; Confidentiality Impact (None)—no data disclosure; Integrity Impact (Low)—limited potential for data corruption; Availability Impact (High)—application crash and denial of service are probable outcomes. The score appropriately reflects a localized availability threat with moderate integrity risk, not a critical remote vulnerability.

Frequently asked questions