{"affected":[{"defaultStatus":"unaffected","product":"Viber for iOS","source":"CNA: VulnCheck","vendor":"Rakuten Viber","versions":[{"lessThanOrEqual":"29.4.0.24","status":"affected","version":"0","versionType":"custom"}]}],"cveId":"CVE-2026-126546","cwes":["CWE-248"],"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.","epss":{"date":"2026-11-13","percentile":0.22474,"score":0.00296},"exploits":[],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794626026219,"publishedAt":1794358736968,"references":[{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-6039.php"},{"source":"CNA: VulnCheck","tags":["product"],"url":"https://www.viber.com/"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/viber-for-ios-through-29.4.0.24-denial-of-service-via-malformed-gif"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.viber.com/"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/viber-for-ios-through-29.4.0.24-denial-of-service-via-malformed-gif"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.zeroscience.mk/en/vulnerabilities/ZSL-2026-6039.php"}],"remediation":[],"revision":"c265df64eecedb51d102e04fa3c9851875feedbc09dd6cfac1f3601024a4b413","sources":[{"modifiedAt":1794626026219,"name":"CNA: VulnCheck","retrievedAt":1794629320636,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126546"},{"modifiedAt":1794519023870,"name":"NVD","retrievedAt":1794529338740,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126546"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794629327192,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126546"}],"ssvc":{"assessedAt":1794626017379,"automatable":"no","exploitation":"none","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Viber for iOS through 29.4.0.24 Denial of Service via Malformed GIF","updatedAt":1794629327192}