What is CVE-2026-28956?

CVE-2026-28956 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-05-11.

How severe is CVE-2026-28956?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Is CVE-2026-28956 known to be exploited?

3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.

Out-of-bounds Read in Apple iOS And Ipados

CVE-2026-28956

A memory corruption issue was addressed with improved input validation. This issue is fixed in iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing a maliciously crafted media file may lead to unexpected app termination or corrupt process memory.

Vulnerability class: Buffer Overflow

Published 2026-05-11 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

EPSS exploit prediction

EPSS: 0.005 (37.7th percentile), scored 2026-09-29.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 38th percentile — 37.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.005 · newest: 0.005 · change: +0.000

Affected products

Apple iOS And Ipados — versions 0
Apple Ipados
Apple Iphone OS
Apple macOS — versions 0
Apple tvOS — versions 0
Apple Visionos — versions 0
Apple watchOS — versions 0

Weakness classification (CWE)

Public proof-of-concept exploits

References

support.apple.com/en-us/127110 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127115 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127116 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127117 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127118 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127119 (Release Notes, Vendor Advisory)
support.apple.com/en-us/127120 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-28956?: CVE-2026-28956 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Out-of-bounds Read. CVSS score: 6.5/10. Published 2026-05-11.
How severe is CVE-2026-28956?: Medium severity. CVSS v3 base score is 6.5 out of 10.
Is CVE-2026-28956 known to be exploited?: 3 public proof-of-concept repositories are indexed. Not currently listed in the CISA KEV catalog.