CVE-2024-27850Network attack vector

User fingerprinting via ineffective noise injection

Published Jun 10, 2024 · Updated Apr 2, 2026

Fingerprinting in Apple WebKit before Safari 17.5 and related platform updates allows remote attackers to identify users via crafted webpages. The noise injection algorithm does not sufficiently obscure webpage-observable measurements, allowing a crafted page to derive a browser fingerprint. A user must load the page; the result is cross-site identification rather than direct access to stored data, and Apple has not disclosed the measured inputs.

CVSS severityUnavailable
Unscored
EPSS probability0.65%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Fingerprinting in Apple WebKit before Safari 17.5 and related platform updates allows remote attackers to identify users via crafted webpages. The noise injection algorithm does not sufficiently obscure webpage-observable measurements, allowing a crafted page to derive a browser fingerprint. A user must load the page; the result is cross-site identification rather than direct access to stored data, and Apple has not disclosed the measured inputs.

The record

CVE
CVE-2024-27850
Published
Jun 10, 2024
Updated
Apr 2, 2026
Vendor
Apple
Product
iOS
Classifications
CWE-359, T1592.004
Attack vector
network
Privileges
unauthenticated

Timeline

How it unfolded

  1. Jun 10, 2024CVE publishedPublication date reported by the CVE source.
  2. Apr 2, 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?

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

  1. Affected versionversion=0 <17.5

What conditions does exploitation require?

Attack vectornetwork
Required privilegesunauthenticated

What is affected?

Apple · iOSversion=0 <17.5
Apple · iOS and iPadOSversion=0 <17.5
Apple · visionOSversion=0 <1.2
Apple · Safariversion=0 <17.5
Apple · macOSversion=0 <14.5
Apple · iPadOSversion=0 <17.5

Published CVSS scores

No CVSS assessment is available in this record.

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 exploitUnconfirmed

Weakness, pattern, technique

CWE-359Exposure of Private Personal Information to an Unauthorized Actor
T1592.004Client Configurations

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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