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Vulnerability record · CVE-2024-44309 · published 20 November 2024

CVE-2024-44309: Apple WebKit cookie state flaw enables cross-site scripting

Debian · Debian Linux

A cookie management flaw in Apple's WebKit engine was fixed by improved state management across Safari, iOS, iPadOS, macOS and visionOS. Processing maliciously crafted web content can trigger a cross-site scripting attack, and Apple states the issue may have been actively exploited on Intel-based Mac systems.

6.3 CVSS 3.1 Medium CISA KEV since 21 Nov 2024 EPSS 23% · top 2.4% CWE-79 · Cross-site scripting
6.3CVSS 3.1 base score
23%EPSS exploitation probability, 30 days
YesIn CISA KEV, fix deadline passed
6Affected product versions listed by NVD
8References
17 Jun 2026Last modified by NVD

Description

A cookie management issue was addressed with improved state management. This issue is fixed in Safari 18.1.1, iOS 17.7.2 and iPadOS 17.7.2, iOS 18.1.1 and iPadOS 18.1.1, macOS Sequoia 15.1.1, visionOS 2.1.1. Processing maliciously crafted web content may lead to a cross site scripting attack. Apple is aware of a report that this issue may have been actively exploited on Intel-based Mac systems.

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

Automated analysis

Generated by VULONE's analysis model from the NVD record, CISA KEV and EPSS data on 17 September 2026. Confidence: high.

high priorityIt is in CISA KEV with reported active exploitation, but the CVSS score is only 6.3 medium and impact is limited.

What it is

A cookie management flaw in Apple's WebKit engine was fixed by improved state management across Safari, iOS, iPadOS, macOS and visionOS. Processing maliciously crafted web content can trigger a cross-site scripting attack, and Apple states the issue may have been actively exploited on Intel-based Mac systems.

Impact

An attacker can run script in the context of a visited site, potentially stealing cookies or session data and acting as the victim in that origin. The CVSS impact ratings are limited (C:L/I:L/A:L), so the direct damage per exploitation is bounded.

Attack surface

Reached over the network by getting a victim to load maliciously crafted web content; the vector requires user interaction (UI:R) and no privileges (PR:N). No authentication is needed on the attacker side.

Exploitation

Listed in CISA KEV with a 2024-12-12 remediation due date, and Apple reports possible active exploitation on Intel-based Macs. EPSS 30-day probability is 0.2259 (97.6th percentile), indicating elevated likelihood.

What to do

  • Update to the fixed versions: Safari 18.1.1, iOS/iPadOS 17.7.2 and 18.1.1, macOS Sequoia 15.1.1, visionOS 2.1.1, or later.
  • Apply the Debian LTS update for affected Debian packages where applicable.
  • Prioritize patching Intel-based Macs, which Apple specifically names as targeted.
  • Until patched, restrict browsing of untrusted sites and enforce script and cookie controls where feasible.
  • Track the CISA KEV due date of 2024-12-12 to confirm remediation.

Detection

  • Monitor for unexpected or injected script execution and anomalous cookie access in browser telemetry.
  • Hunt for Safari/WebKit crashes or abnormal behavior on Intel-based Macs following visits to untrusted sites.
  • Review web proxy and DNS logs for known malicious or newly registered domains delivering crafted content.
  • Correlate endpoint browser version data against the fixed release list to find unpatched hosts.

This assessment is produced automatically and is not human-reviewed. Verify against the vendor advisory before acting on it.

Exploitation in the wild

CISA added CVE-2024-44309 to the Known Exploited Vulnerabilities catalog on 21 November 2024 as "Apple Multiple Products Cross-Site Scripting (XSS) Vulnerability". Required action: Apply mitigations per vendor instructions or discontinue use of the product if mitigations are unavailable. Federal deadline 12 December 2024.

Affected products

6 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://support.apple.com/en-us/121752 Vendor Advisory
https://support.apple.com/en-us/121753 Vendor Advisory
https://support.apple.com/en-us/121754 Vendor Advisory
https://support.apple.com/en-us/121755 Vendor Advisory
https://support.apple.com/en-us/121756 Vendor Advisory
http://seclists.org/fulldisclosure/2024/Nov/16 Mailing ListThird Party Advisory
https://lists.debian.org/debian-lts-announce/2024/12/msg00003.html Mailing List
https://www.cisa.gov/known-exploited-vulnerabilities-catalog?field_cve=CVE-2024-44309 US Government Resource

Track CVE-2024-44309 inside VULONE

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Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2024-44309), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.