high
advisory
Whale Browser: Iframe sandbox bypass (CVE-2026-120987)
Whale Browser before 5.39.412.57 allows an attacker to bypass the iframe sandbox in a dual-tab environment.
CVE search metadata
CVE search record: CVE-2026-120987. Severity: high. CVSS: 7.5. EPSS: 0.11%. KEV: no. Product: Whale Browser (< 5.39.412.57). Brief: Whale Browser: Iframe sandbox bypass (CVE-2026-120987). Brief link: https://feed.craftedsignal.io/briefs/2026-11-whale-browser-sandbox-bypass/
Triage facts
Revision 1- Applicability
- Whale Browser (< 5.39.412.57)
- Evidence
- Unknown
- Severity
- High
- Sources
- 1 public source
- Freshness
- Revision 1Nov 6, 21:29 UTC
- Vulnerabilities
- 1 CVE
- Source quality
- A2Roughly even chance
Whale Browser before 5.39.412.57 contains a vulnerability that allows an attacker to bypass the iframe sandbox in a dual-tab environment.