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TI-2026-80549 Aliases CVE-2026-116631GHSA-cmr9-xw44-879p

Tel link prompt spoofs the address bar in Firefox for iOS

Priority LOW 24CWE-451Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
Required
Attack complexity
Low
Impact type
Spoofing
Confidentiality · integrity · availability
Low · None · Low
Fix status
Fixed

Attack profile from CVSS 3.1 · CISA ADP. Fix status from CNA. Impact type from CWE-451.

Summary

A malicious web page can open a tel link in a window that shows a different website, so the phone-call prompt appears as if that site had requested the call. The flaw is a user interface misrepresentation of critical information (CWE-451). An unauthenticated remote attacker needs a victim to interact with the page to trigger it.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

Description from the CNA

A malicious web page could open a tel link in a window that was showing a different website, causing the phone-call prompt to appear as if that site had requested the call. This vulnerability was fixed in Firefox for iOS 156.1.

Why it matters now

Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00213 11th percentileScored 2026-11-07
Fix Fixed Firefox for iOS (Mozilla): 156.1

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
None
Automatable
No
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
MozillaFirefox for iOS—156.1Patch availableCNA
  • Firefox for iOS VendorMozilla Affected — Fixed in 156.1 Patch available CNA

Remediation

Mozilla fixed this in Firefox for iOS 156.1, so update Firefox for iOS to 156.1 or later.

Written with Claude Haiku 5.5 from the sources below · 2026-10-29

  • Fix · CNA Firefox for iOS (Mozilla) Fixed in 156.1

Vendor assessments

Red Hat

Red Hat rating: Low. Red Hat's page for this CVE →

Not affected: 5 products
  • Red Hat Enterprise Linux 10
  • Red Hat Enterprise Linux 6
  • Red Hat Enterprise Linux 7
  • Red Hat Enterprise Linux 8
  • Red Hat Enterprise Linux 9

Timeline

  1. 2026-10-26 Threatist record created from CVE-2026-116631
  2. 2026-10-26 CVSS score added · CISA ADP
  3. 2026-10-26 Weakness changed · CISA ADP
  4. 2026-10-26 CISA SSVC decision points changed
  5. 2026-10-27 Alias added: GHSA-cmr9-xw44-879p
  6. 2026-10-29 Affected versions changed · Red Hat
  7. 2026-10-29 CVSS score added · Red Hat

References

Other 2

  • TI-2024-08981 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.8
  • TI-2022-09832 Use after free in Mozilla Firefox KEVCVSS 3.1CRITICAL 9.6
  • TI-2019-08769 Improper input validation in Mozilla Firefox ESR KEVCVSS 3.1CRITICAL 10.0
  • TI-2010-03577 Mozilla Firefox 3.5.x through 3.5.14 and 3.6.x through 3.6.11, Thunderbird 3.1.6 before… KEVCVSS 3.1CRITICAL 9.8
  • TI-2023-04799 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
  • TI-2023-04477 Out-of-bounds write in Google Chrome KEVCVSS 3.1HIGH 8.8
See all 4204 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences