EUVD-2026-40198
GHSA-9xg4-m7cw-j39m
Severity by source
AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
AV:N reflects network-delivered extension; AC:H for required extension install and specific trigger; UI:R mandatory; no C/I impact, only process crash (A:H).
Primary rating from Vendor (apple).
CVSS VectorVendor: apple
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H
Lifecycle Timeline
5DescriptionCVE.org
A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. A malicious web extension may be able to cause an unexpected process crash.
AnalysisAI
Use-after-free memory corruption in Apple Safari (and the broader iOS/iPadOS/macOS Tahoe platform) allows a malicious web extension to trigger an unexpected process crash, resulting in a denial-of-service condition. Affected versions span all Safari, iOS/iPadOS, and macOS Tahoe releases prior to 26.5.2, with Apple-confirmed fixes available across all three platforms. …
Unlock full vulnerability intelligence
- Risk assessment & exploitation conditions
- Attack chain visualization
- Remediation with exact patch versions
- Threat intelligence from 22 sources
- Personal watchlist & email alerts
Free forever · No credit card required
Attack ChainAIDerived
Hypothetical attack flow derived from CVE metadata
Vulnerability AssessmentAI
| Exploitation | Exploitation requires that the victim has installed a malicious Safari web extension on their device - this is a hard prerequisite and the primary limiting factor. … Additional conditions and limiting factors are described in the full assessment. |
| Risk Assessment | The CVSS 3.1 base score of 5.3 (Medium) is supported by a vector of AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H. … Full risk analysis with EPSS, KEV, and SSVC signal comparison available after sign-in. |
| Exploit Scenario | An attacker publishes or distributes a malicious Safari web extension - potentially via a third-party site or social engineering - and convinces a user to install it. Once installed, when the user interacts with the browser in a way that triggers the extension's use-after-free code path, the Safari process crashes unexpectedly, resulting in loss of the browsing session and a denial-of-service condition. … |
| Remediation | The primary fix is to update to Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, or macOS Tahoe 26.5.2, as confirmed by Apple's security advisories at https://support.apple.com/en-us/127594, https://support.apple.com/en-us/127595, and https://support.apple.com/en-us/127685. … Detailed patch versions, workarounds, and compensating controls in full report. |
Threat intelligence, references, and detailed analysis are available after sign-in.
More in Ios And Ipados
View allKernel memory corruption in Apple iOS/iPadOS (before 26.5.2) and macOS Tahoe (before 26.5.2) allows a malicious or compr
Memory corruption in Apple's WebKit browser engine (Safari and the system WebView on iOS, iPadOS, and macOS before 26.5.
Memory corruption via type confusion in Apple's WebKit browser engine allows attackers to corrupt memory by luring a vic
Memory corruption via use-after-free in Apple's WebKit browser engine allows remote attackers to corrupt memory when a v
Memory-corruption crash in Apple's WebKit web-content engine lets a malicious website terminate the content-rendering pr
The issue was addressed with improved memory handling. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and
Use-after-free in WebKit allows remote attackers to trigger Safari crashes and potentially achieve arbitrary code execut
The issue was addressed with improved checks. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS
Content Security Policy bypass in Apple's WebKit-based platforms (iOS, iPadOS, macOS Tahoe, tvOS, visionOS, watchOS) all
Local privilege escalation and kernel memory corruption in Apple iOS, iPadOS (before 26.5.2) and macOS Tahoe (before 26.
Memory corruption in WebKit across Apple's ecosystem enables confidentiality breach via malicious web content without us
Information disclosure in Apple WebKit's web content processing engine allows remote attackers to read sensitive memory
Same weakness CWE-416 – Use After Free
View allSame technique Memory Corruption
View allShare
External POC / Exploit Code
Leaving vuln.today