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VulnerabilityPublished Updated

CVE-2026-9078: Mozilla Firefox for iOS · CWE-451

Affects Mozilla Firefox for iOSSource CVE Database V5

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Not known to be exploited · CVSS 5.4 Medium · patch available : update Mozilla Firefox for iOS when convenient.

Data as of 30 Oct 2026, 11:52 UTC

CVSS 3.1 base score
5.4Medium
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.1% chance of exploitation in 30 days – higher than 9% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
Patch
Available
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:L

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 25 May 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponized: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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 30 Oct 2026.

What to do

Affected software

ProductAffectedFixed in
Mozilla Firefox for iOSAffected
  • <151.1
Fixed in
  • 151.1

AI-suggested

Mozilla fixed this vulnerability in Firefox for iOS version 151.1. Users and administrators should update to Firefox for iOS 151.1 or later to remediate this issue. No additional mitigation actions are required as per the vendor advisory.

Description

Firefox for iOS displayed specially crafted right-to-left (RTL) and internationalized domain names (IDNs) incorrectly in link preview UI surfaces. A crafted RTL hostname could visually reorder portions of the displayed domain, causing attacker-controlled sites to appear as trusted origins. This vulnerability was fixed in Firefox for iOS 151.1.

References

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