Vulnerability · Published Nov 3, 2026 · Assigned by naver
CVE-2026-120987
Unrated
In plain English
A security flaw in NAVER Whale browser from NAVER. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 1% of all known vulnerabilities).
Severity (CVSS )–Not rated
Exploit odds (30 days)0.1%top 98.6% of all CVEs
Exploited in the wildNo reportsnot in CISA KEV
Attack toolingNoneno public tooling known
Official description
Whale Browser before 5.39.412.57 allows an attacker to bypass the iframe sandbox in a dual-tab environment.
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| NAVER | NAVER Whale browser | see references |
Weakness: CWE-346
References
- https://cve.naver.com/detail/cve-2026-120987.html vendor-advisory