CVE-2026-120987: NAVER Whale browser · Origin Validation Error
Affects NAVER Whale browserSource CVE Database V5
Not known to be exploited.
Data as of 3 Nov 2026, 06:59 UTC
Rated High by Threat Radar's AI analysis · CVSS not yet scored by NVD
Thin evidence
One scorer or noneExploitation evidence
Disclosed: evidence found.
CVE published 3 Nov 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponized: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 2 Nov 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| NAVERNAVER Whale browser | Affected– | Fixed in– |
AI-suggested
A fixed version 5.39.412.57 or later addresses this vulnerability. Users should update to this version or later to remediate the issue.
Description
CVE-2026-120987 is a vulnerability in NAVER Whale browser versions before 5.39.412.57 that allows an attacker to bypass the iframe sandbox in a dual-tab environment. This flaw relates to improper origin validation (CWE-346).