Zero‑Day RCE in Telegram’s rlottie Library (CVE‑2026‑111105) Enables Remote Code Execution
What It Is – A numeric‑truncation flaw in Telegram’s rlottie animation library allows an attacker to write before the start of an allocated buffer, leading to remote code execution. User interaction (visiting a malicious page or opening a crafted file) is required to trigger the exploit.
Exploitability – CVSS 7.0 (High). The vulnerability is publicly disclosed as a 0‑day; no public exploit code is known, but the attack path is fully described.
Affected Products – Telegram client applications that embed the rlottie library (all platforms).
Why It Matters for Trust & Control Assurance
- Demonstrates the need for continuous vulnerability‑management controls that capture, assess, and remediate software flaws across the supply chain.
- Provides evidence that a robust control‑mapping process can surface high‑severity gaps before they are leveraged in the wild, supporting defensible audit trails.
- Highlights the importance of secure configuration and user‑interaction safeguards as part of a broader risk‑based assurance posture demanded by enterprise buyers.
Recommended Actions
- Deploy Telegram’s server‑side validation update immediately and restrict user interaction with untrusted content.
- Run internal scans to identify any rlottie instances in your environment and verify they are patched.
- Update your vulnerability‑management playbook to include numeric‑truncation checks for third‑party libraries.