VulnerabilityPublished 16 Sep 2024Updated 2 Apr 2026

CVE-2024-44187: Apple Safari · A malicious website may exfiltrate data cross-origin

Affects Apple SafariSource CVE Database V5

Not known to be exploited · CVSS 6.5 Medium.

Data as of 26 Oct 2026, 14:05 UTC

CVSS 3.1 base score

6.5Medium

How severe the flaw is on the 0–10 CVSS scale.

EPSS: 0.6% chance of exploitation in 30 days – higher than 50% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:N/A:N

Attack Vector: Network
Attack Complexity: Low
Privileges Required: None
User Interaction: Required
Scope: Unchanged
Confidentiality: High
Integrity: None
Availability: None

Bold values are the worst case: easiest to exploit or largest impact.

Attack Vector: Network: The vulnerable component is bound to the network stack and the set of possible attackers extends beyond the other options listed, up to and including the entire Internet. Such a vulnerability is often termed 'remotely exploitable' and can be thought of as an attack being exploitable at the protocol level one or more network hops away (e.g., across one or more routers).
Attack Complexity: Low: Specialized access conditions or extenuating circumstances do not exist. An attacker can expect repeatable success against the vulnerable component.
Privileges Required: None: The attacker is unauthorized prior to attack, and therefore does not require any access to settings or files to carry out an attack.
User Interaction: Required: Successful exploitation of this vulnerability requires a user to take some action before the vulnerability can be exploited.
Scope: Unchanged: An exploited vulnerability can only affect resources managed by the same security authority. In this case, the vulnerable component and the impacted component are either the same, or both are managed by the same security authority.
Confidentiality: High: There is total loss of confidentiality, resulting in all resources within the impacted component being divulged to the attacker. Alternatively, access to only some restricted information is obtained, but the disclosed information presents a direct, serious impact.
Integrity: None: There is no loss of integrity within the impacted component.
Availability: None: There is no impact to availability within the impacted component.

Definitions: FIRST CVSS v3.1 specification.

Exploitation evidence

Disclosed: evidence found.
CVE published 16 Sep 2024
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by 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 26 Oct 2026.

Disclosed: The CVE record is public on cve.org. Its publication is t = 0.
Detectable: A public nuclei template can find exposed instances, for defenders and attackers alike.
Weaponised: Public exploit code exists in Metasploit or Exploit-DB, or CISA SSVC or the CVSS exploit maturity reports a public proof of concept.
Exploited in the wild: CISA KEV lists it, CISA SSVC rates exploitation active, or a source reports attacks.
Observed by OffSeq Mirage: OffSeq Mirage honeypot sensors recorded attack traffic for this CVE, or found exposed hosts without attack traffic.

Moments are spaced evenly, not to scale; a dashed line marks a gap of six months or more. Deltas count from t = 0. Sources that give only a date (CISA KEV, Exploit-DB, or a time of exactly 00:00Z) read “same day” rather than hours. Metasploit modules carry the flaw’s disclosure date, not their release date, and nuclei templates carry no date, so both appear above but not on the timeline.

What to do

Affected software

Product	Affected	Fixed in
Apple Safari	Affected =0	Fixed in–

AI-suggested

To mitigate CVE-2024-44187, organizations should: 1) Immediately update all Apple devices to Safari 18 or later and ensure operating systems are updated to iOS 18, iPadOS 18, macOS Sequoia 15, tvOS 18, visionOS 2, or watchOS 11 as applicable. 2) Enforce strict update policies for managed devices to prevent use of vulnerable Safari versions. 3) Educate users about the risks of visiting untrusted websites and clicking on suspicious links to reduce the chance of triggering the vulnerability. 4) Employ network-level protections such as web filtering and DNS filtering to block access to known malicious domains. 5) Monitor network traffic for unusual data exfiltration patterns that may indicate exploitation attempts. 6) Consider deploying endpoint detection and response (EDR) solutions capable of detecting anomalous browser behavior. 7) Review and restrict iframe usage in internal web applications to minimize exposure. 8) For high-risk environments, consider using alternative browsers not affected by this vulnerability until patches are fully deployed. These steps go beyond generic advice by focusing on both technical patching and user behavior controls.

Description

A cross-origin issue existed with "iframe" elements. This was addressed with improved tracking of security origins. This issue is fixed in Safari 18, iOS 18 and iPadOS 18, macOS Sequoia 15, tvOS 18, visionOS 2, watchOS 11. A malicious website may exfiltrate data cross-origin.

Impact

The primary impact of CVE-2024-44187 is the unauthorized disclosure of sensitive information due to cross-origin data exfiltration. Organizations with employees or users who browse the web using vulnerable versions of Safari risk exposure of confidential data, including session tokens, personal information, or other sensitive content loaded in iframes from different origins. This could facilitate further attacks such as account takeover or targeted phishing. Since the vulnerability requires user interaction, social engineering could be used to lure victims to malicious sites. The flaw does not affect data integrity or availability, so it does not cause system disruption or data modification. However, the breach of confidentiality can have serious consequences for privacy compliance, intellectual property protection, and overall organizational security posture. Enterprises relying heavily on Apple devices and Safari for web access are particularly at risk, especially in sectors handling sensitive data such as finance, healthcare, and government. The absence of known exploits in the wild currently reduces immediate risk but patching is critical to prevent future exploitation.

CWE-346Origin Validation Error (opens in a new tab)
Class weaknessOWASP Top 10 A07:2025: Authentication Failures (opens in a new tab)
The product does not properly verify that the source of data or communication is valid.
OWASP Cheat Sheets
OWASP Authentication (opens in a new tab)
OWASP ASVS 4.0.3
V14.5.2 (opens in a new tab)
V14.5.3 (opens in a new tab)
V1.4.4 (opens in a new tab)
Attack patterns
JSON Hijacking (aka JavaScript Hijacking) (opens in a new tab)
Cache Poisoning (opens in a new tab)
DNS Cache Poisoning (opens in a new tab)
Exploit Script-Based APIs (opens in a new tab)
Application API Message Manipulation via Man-in-the-Middle (opens in a new tab)
From MITRE CWE, MITRE CAPEC and OWASP (Top 10, OpenCRE).

References

Community reviews

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Exploitation evidence

What to do

Affected software

Description

AI analysisMachine-generated, updated 2 Apr 2026, 23:53 UTC

WeaknessesCWE-346

Technical details

References

Community reviews

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