Secuno
ENNL
Book demo

CVE-2026-65391

8.8 HIGHEPSS 0.17%
  1. Published14 Sept 2026

Description

An out-of-bounds write issue was addressed with improved bounds checking. This issue is fixed in Safari 26.6.1, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, tvOS 27, visionOS 27, watchOS 27. Processing maliciously crafted web content may lead to memory corruption.

CVSS 3.1 breakdown

Attack vectorNetwork
Attack complexityLow
Privileges requiredNone
User interactionRequired
ScopeUnchanged
ConfidentialityHigh
IntegrityHigh
AvailabilityHigh
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Remediation

No fixed version is recorded in the NVD data. Check the vendor advisory for the latest guidance.

References

Related CVEs

Recent high-severity vulnerabilities sharing a weakness type.

CVE-2026-917289.6
Integer overflow in V8 in Google Chrome prior to 153.0.8010.47 allowed a remote…
CVE-2026-653908.8
An integer overflow was addressed with improved input validation. This issue is fixed…
CVE-2026-870208.1
An integer overflow in a specified pitch and buffer-size computation leads to a heap…
CVE-2026-852289.1
An integer overflow in the tensor buffer validation component in Amazon Deep Java…
CVE-2026-878238.2
zstd-jni before 1.5.7-14 performs 32-bit signed bounds checks on three…
CVE-2026-876439.6
Integer overflow in GPU in Google Chrome on on Android prior to 153.0.8010.36 allowed a…

Frequently asked

Is CVE-2026-65391 being actively exploited?

CVE-2026-65391 is not in the CISA KEV catalog. Its EPSS exploit probability is 0.17%.

How severe is CVE-2026-65391?

CVE-2026-65391 has a CVSS 3.1 base score of 8.8, rated high. EPSS estimates a 0.17% probability of exploitation.

How do I fix CVE-2026-65391?

Apply the vendor's patch or advisory guidance, then verify no affected versions remain across your devices.

How Secuno handles this

Secuno correlates vulnerabilities like CVE-2026-65391 against the real software inventory on every managed device, every day. Rather than a static severity, each match is scored in context: exploit availability, EPSS, the asset's exposure, and business criticality decide where it lands in the queue. If an affected version is present anywhere across your portfolio, it surfaces automatically with a prioritised remediation path.

See how prioritisation worksBook a demo

Data from the NVD, CISA KEV catalog and FIRST EPSS. CVSS 3.1 base score shown where available.