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  4. CVE 2026 126546 viber for ios through 294024 denial of service
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Back to active CVEs
Medium · CVSS 5.3CVE-2026-126546

Viber for iOS through 29.4.0.24 Denial of Service via Malformed GIFCVE-2026-126546

Answer in brief

CVE-2026-126546 records a Medium severity (CVSS 5.3) vulnerability in Viber for iOS through 29.4.0.24 Denial of Service via Malformed GIF. The current sources do not mark it as known exploited. The current feed maps Rakuten Viber/Viber for iOS (generic). Check affected ranges and fixed versions before updating.

Analysis pending evidence review

HOL Guard separates source facts from reviewed analysis. See the methodology.

Published Nov 11, 2026Updated Nov 11, 2026Source checked Nov 11, 2026First seen by HOL Nov 11, 2026Material review Nov 11, 2026
Upstream Advisory

Key facts

Risk
Medium · CVSS 5.3
Exploitation
Not marked as known exploited
Affected software
1 mapped package or product
Fix availability
Not reported

Why this deserves its current priority

CVSS is 5.3. The current sources do not mark it as known exploited. Treat this as a source-backed prioritization signal, not a statement about your environment.

Analysis status

Analysis pending evidence review

Factual feed record only; HOL analysis is not approved for indexing. Read the methodology.

Affected scope and exposure questions

The current feed maps Rakuten Viber/Viber for iOS (generic). Check affected ranges and fixed versions before updating.

Mapped affected packages and fixed versions
PackageAffected rangeFixed version
Rakuten Viber/Viber for iOSgeneric>=0 <=29.4.0.24Not reported

Recommended response

  1. 1Check inventory. Check lockfiles and deployed manifests for Rakuten Viber/Viber for iOS.
  2. 2Review the reported fix. Monitor this advisory for an available fix and review any installs of the affected package.

Evidence timeline and material changes

  1. Published upstream

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  2. Source modified

    Nov 11, 2026

    Evidence: source:cvelist:source_dates:source-dates:record

  3. First seen by HOL

    Nov 11, 2026

Sources and claim methodology

  • Source referenceviber.com
  • Source referencevulncheck.com
  • Source referencezeroscience.mk
Upstream source 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.

Quoted source text, attributed separately from HOL analysis.

Record context

Vulnerability class
Vulnerability
EPSS
Not reported
CWE IDs
CWE-248
Source
CVE List V5
Source checked
Nov 11, 2026
References
3 linked sources
Open source record