Medium severity4.3NVD Advisory· Published Nov 11, 2026

CVE-2026-126546

Description

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.

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LLM-synthesized narrative grounded in this CVE's description and references.

Affected products

Viber/Viberllm-fuzzy
Range: <=29.4.0.24

Patches

Vulnerability mechanics

References

www.viber.comnvd
www.vulncheck.com/advisories/viber-for-ios-through-29.4.0.24-denial-of-service-via-malformed-gifnvd
www.zeroscience.mk/en/vulnerabilities/ZSL-2026-6039.phpnvd

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