CVE-2026-126546
Viber for iOS through 29.4.0.24 Denial of Service via Malformed GIF
CVSS Score
4.3
EPSS Score
0.0%
EPSS Percentile
0th
Viber for iOS through 29.4.0.24 fails to validate the logical screen width and height in received GIF headers, allowing attackers to crash the app. Attackers can send a crafted GIF with zero dimensions that triggers an uncaught NSInternalInconsistencyException, aborting the app with SIGABRT when opened.
| CWE | CWE-248 |
| Vendor | rakuten viber |
| Product | viber for ios |
| Published | Nov 11, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
Low
Affected Versions
Rakuten Viber / Viber for iOS
0 ≤ 29.4.0.24
References
Credits
Gjoko Krstic