CVE-2026-9078Network attack vector

Origin spoofing via reordered RTL hostname previews

Published May 25, 2026 · Updated May 25, 2026

Origin spoofing in Firefox for iOS before 151.1 allows remote attackers to present attacker-controlled sites as trusted origins. The link preview UI renders specially crafted right-to-left and internationalized hostnames in a visually reordered form instead of preserving an unambiguous domain order. A user must view the crafted link preview; the flaw misrepresents the destination origin but does not itself grant site access or code execution.

CVSS severity5.4
Medium
EPSS probability0.20%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin spoofing in Firefox for iOS before 151.1 allows remote attackers to present attacker-controlled sites as trusted origins. The link preview UI renders specially crafted right-to-left and internationalized hostnames in a visually reordered form instead of preserving an unambiguous domain order. A user must view the crafted link preview; the flaw misrepresents the destination origin but does not itself grant site access or code execution.

The record

CVE
CVE-2026-9078
Published
May 25, 2026
Updated
May 25, 2026
Vendor
Unknown vendor
Product
Unknown product
Classifications
CWE-451, T1036.002
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. May 25, 2026CVE publishedPublication date reported by the CVE source.
  2. May 25, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Affected buildAffected product and version details are unavailable.

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Affected products and versions are unavailable in this record.

Published CVSS scores

5.4CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

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No observations available

Sep 9, 2026Sep 15, 2026
Latest reporting daySep 15, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-451User Interface (UI) Misrepresentation of Critical Information
T1036.002Right-to-Left Override

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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