PatchTheCVECVE-2026-81267: A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to dis
CVE-2026-81267 is a medium-severity flaw (CVSS 5.4) affecting firefox mobile. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.
A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to display the destination origin while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iOS 155.0.
Why this priority
- No elevated risk signals yet
A fixed release or distro patch exists.
Risk facts
| CVSS score | 5.4 (Medium) |
| Attack vector | Network (remote) |
| Attack complexity | Low |
| Privileges needed | None |
| User interaction | Required |
| EPSS exploit chance | 0.3% (top 83%) |
| CISA exploited list | No |
| Weakness | CWE-451 |
| Published | 2026-08-31 |
| Last modified | 2026-09-03 |
Last updated 2026-09-03 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score
Am I affected?
Timeline
- Published CVE record published
- Updated Record last modified
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.
Quick answers
How do I fix CVE-2026-81267?
firefox mobile: upgrade to 155.0. Exact commands for each OS are on this page.
Is CVE-2026-81267 being exploited?
CVE-2026-81267 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.
What does CVE-2026-81267 affect?
CVE-2026-81267 affects firefox mobile. Severity is medium (CVSS 5.4). A malicious webpage could stall a popup's cross-origin navigation after commit, causing the address bar to display the destination origin while continuing to render attacker-controlled content. This vulnerability was fixed in Firefox for iO
How urgent is CVE-2026-81267?
Priority 23/100. No elevated risk signals yet.
Software pages
iOS vulnerabilities · Mozilla Firefox vulnerabilities
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