Bug 2553638 (CVE-2026-111105)

Summary: CVE-2026-111105 rlottie: rlottie: arbitrary code execution via out-of-bounds write
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: medium    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in rlottie. This vulnerability allows remote attackers to execute arbitrary code due to improper validation of user-supplied data, which can cause an out-of-bounds write before the start of an allocated buffer. Successful exploitation requires user interaction, such as convincing a target to open a specially crafted file or visit a malicious webpage.
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Bug Depends On: 2554382, 2554384    
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Description OSIDB Bzimport 2026-10-15 17:52:02 UTC 
Telegram rlottie Numeric Truncation Remote Code Execution Vulnerability. This vulnerability allows remote attackers to execute arbitrary code on affected installations of Telegram. User interaction is required to exploit this vulnerability in that the target must visit a malicious page or open a malicious file.

The specific flaw exists within the rlottie library. The issue results from the lack of proper validation of user-supplied data, which can result in a write before the start of an allocated buffer. An attacker can leverage this vulnerability to execute code in the context of the current process. Was ZDI-CAN-30207.