CVE-2026-43718
published 2026-06-29CVE-2026-43718: A stack overflow was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2…
PriorityP432medium6.5CVSS 3.1
AVNACLPRNUIRSUCNINAH
EPSS
0.28%
20.3th percentile
A stack overflow was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.
Affected
6 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| apple | ios_and_ipados | < 26.5.2 | 26.5.2 |
| apple | ipados | < 26.5.2 | 26.5.2 |
| apple | iphone_os | < 26.5.2 | 26.5.2 |
| apple | macos | < 26.5.2 | 26.5.2 |
| apple | macos | >= 26.0 < 26.5.2 | 26.5.2 |
| apple | safari | < 26.5.2 | 26.5.2 |
Stop checking back — get the weekly exploitation signal.
Every Monday: what got weaponized or added to CISA KEV in the last seven days — each CVE cross-linked to its PoC, Nuclei template, and detection rule. Free, one email a week, unsubscribe in one click.
VulDB
Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web stack-based overflow
vuldb·2026-06-30·CVSS 6.5
CVE-2026-43718 [MEDIUM] Apple Safari/iOS/iPadOS/macOS up to 26.5.1 Web stack-based overflow
A vulnerability was found in Apple Safari, iOS, iPadOS and macOS up to 26.5.1. It has been classified as critical. The affected element is an unknown function of the component Web Handler. This manipulation causes stack-based buffer overflow.
This vulnerability appears as CVE-2026-43718. The attack may be initiated remotely. There is no available exploit.
Upgrading the affected component is recommended.
GHSA
A stack overflow was addressed with improved input validation.
ghsa_unreviewed·2026-06-29
CVE-2026-43718 [MEDIUM] CWE-121 A stack overflow was addressed with improved input validation.
A stack overflow was addressed with improved input validation. This issue is fixed in Safari 26.5.2, iOS 26.5.2 and iPadOS 26.5.2, macOS Tahoe 26.5.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.
No detection rules found.
No public exploits indexed.
Sans Isc
June 2026 Apple Updates, (Tue, Jun 30th)
blogs_sans_isc·2026-06-30·CVSS 9.1
CVE-2026-39868 [CRITICAL] June 2026 Apple Updates, (Tue, Jun 30th)
June 2026 Apple Updates
Published: 2026-06-30. Last Updated: 2026-06-30 09:31:27 UTC
by Johannes Ullrich (Version: 1)
0 comment(s)
Apple released updates for iOS/iPadOS, macOS, and Safari on Monday. There have been no updates for other Apple operating systems (visionOS, watchOS, tvOS). Usually, Apple updates all products at the same time.
Most of the vulnerabilities affect the web browser (WebKit, libxslt, WebRTC, and Web Extension). Only four of the vulnerabilities are not directly related to web content: Three Kernel issues and one vulnerability in the IOGPUFamily.
None of the vulnerabilities is labeled as "exploited".
iOS 26.5.2 and iPadOS 26.5.2 macOS Tahoe 26.5.2 Safari 26.5.2
CVE-2026-39868: An app may be able to cause unexpected system termination or corrupt kernel memory.
A
Bugzilla
CVE-2025-43718 poppler: Poppler stack overflow [fedora-42]
bugzilla·2025-10-02·CVSS 2.9
CVE-2025-43718 [LOW] CVE-2025-43718 poppler: Poppler stack overflow [fedora-42]
CVE-2025-43718 poppler: Poppler stack overflow [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
The following link provides references to all essential vulnerability management information. If something is wrong or missing, please contact a member of PSIRT.
https://spaces.redhat.com/display/PRODSEC/Vulnerability+Management+-+Essential+Documents+for+Engineering+Teams
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that ar
2026-06-29
Published