What is CVE-2026-111105?

CVE-2026-111105 is a high-severity vulnerability in Telegram, classified under CWE-197. CVSS score: 7.0/10. Published 2026-10-15.

How severe is CVE-2026-111105?

High severity. CVSS v3 base score is 7.0 out of 10.

Vulnerability in Telegram

CVE-2026-111105

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.

Published 2026-10-15 · last modified 2026-10-15.

CVSS v3 metric

CVSS v3 base score 7.0 (High). Vector: CVSS:3.0/AV:L/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Telegram — versions 6.6.2

Weakness classification (CWE)

CWE-197

References

www.zerodayinitiative.com/advisories/ZDI-26-757/ (x_research-advisory)

Frequently asked questions

What is CVE-2026-111105?: CVE-2026-111105 is a high-severity vulnerability in Telegram, classified under CWE-197. CVSS score: 7.0/10. Published 2026-10-15.
How severe is CVE-2026-111105?: High severity. CVSS v3 base score is 7.0 out of 10.