CVE-2024-5687Public exploitNetwork attack vector

Origin-header disclosure via inherited triggering principal

Published Jun 11, 2024 · Updated Aug 1, 2024

Improper access control in Firefox for Android before 127 allows remote attackers to receive misleading origin headers after a new tab opens. Android Components passes a parent engine session whenever a tab has a parent object, so a later manual navigation inherits the prior tab's triggering principal and referrer. Exploitation requires a specific new-tab and navigation sequence, and the bounded consequence is incorrect Referer and Sec-* data plus security checks based on the wrong principal.

CVSS severity5.3
Medium
EPSS probability0.41%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Improper access control in Firefox for Android before 127 allows remote attackers to receive misleading origin headers after a new tab opens. Android Components passes a parent engine session whenever a tab has a parent object, so a later manual navigation inherits the prior tab's triggering principal and referrer. Exploitation requires a specific new-tab and navigation sequence, and the bounded consequence is incorrect Referer and Sec-* data plus security checks based on the wrong principal.

The record

CVE
CVE-2024-5687
Published
Jun 11, 2024
Updated
Aug 1, 2024
Vendor
Mozilla
Product
Firefox
Classifications
CWE-284
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 11, 2024CVE publishedPublication date reported by the CVE source.
  2. Aug 1, 2024Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=0 <127
  2. Affected versionversion=unspecified <127

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Mozilla · Firefoxversion=0 <127; version=unspecified <127

Published CVSS scores

5.3CISA-ADPCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N

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.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesunauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-284Improper Access Control

Public exploit references

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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