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CVE Record

CVE-2026-28883: A use-after-free issue was addressed with improved memory management.

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.5, iOS 26.5 and iPadOS 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, watchOS 26.5. Processing maliciously crafted web content may lead to an unexpected process crash.

HighCVSS 8.8Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

Apple fixed a memory safety flaw that can be triggered by malicious web content. Affected users may experience an unexpected process crash, and the CVSS vector indicates potential confidentiality, integrity, and availability impact. The source bundle does not show active exploitation.

Executive priority

Patch on an accelerated cycle for Apple fleets, especially managed laptops and mobile devices. There is no source-backed active exploitation claim, but the remote web-content attack surface and high CVSS score justify prompt remediation.

Technical view

CVE-2026-28883 is a CWE-416 use-after-free in Apple web-content processing, fixed with improved memory management. The issue affects Safari, iOS/iPadOS, macOS Tahoe, tvOS, visionOS, and watchOS before the listed 26.5 fixes. Exploitation requires user interaction with crafted web content.

Likely exposure

Organizations with Apple endpoints or managed devices running pre-26.5 Safari or Apple operating systems are the likely exposure group. Risk is highest where users browse untrusted sites or receive links through email, messaging, or collaboration tools.

Exploitation context

The bundle marks KEV as false and provides no cited evidence of active exploitation. The attack path is remote web content with user interaction, not authenticated local access. Public evidence supports a crash outcome; broader impact is inferred from the CVSS vector.

Researcher notes

The source bundle is thin on root-cause detail and does not identify a WebKit component, crash signature, or proof-of-concept. Avoid assuming code execution or active exploitation unless later Apple, KEV, or vendor data supports it.

Mitigation direction

  • Update Safari to 26.5 where applicable.
  • Update iOS and iPadOS devices to 26.5.
  • Update macOS Tahoe systems to 26.5.
  • Update tvOS, visionOS, and watchOS devices to 26.5.
  • Check Apple and Red Hat advisories for platform-specific guidance.
  • Prioritize users exposed to untrusted links and web content.

Validation and detection

  • Inventory Apple devices and Safari versions against the 26.5 fixed releases.
  • Confirm MDM or endpoint tooling reports successful update installation.
  • Review browser and WebKit crash telemetry for unusual patterns.
  • Track Apple advisories for any revised impact or mitigation details.
  • Check KEV status periodically for exploitation changes.
Prepared
Confidence
medium
Sources
10

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-416: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-28883 mapping review

Open the CVE-to-ATT&CK bridge for reviewed, inferred, or future official mappings tied to this CVE.

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Vulnerability profileCVE Program record
Severity
High
CVSS
8.8 (3.1)
Known Exploited
No
Published

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

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

2CVSS vectors
5Timeline events
2ADP providers
19Source links

SSVC decision data

CISA-ADPCISA Coordinator
Timestamp
Version
2.0.3
Exploitation: noneAutomatable: yesTechnical Impact: partial

CVSS vector scores

2 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H2.85.9redhat-SADP
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N3.93.6CISA-ADP

Vulnerability scoring details

Base CVSS 3.1 score

8.8High
CVSS 3.1 vector shape for CVE-2026-28883Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Privileges Required
NoneLowHigh
User Interaction
NoneRequired
Scope
ChangedUnchanged
Confidentiality Impact
HighLowNone
Integrity Impact
HighLowNone
Availability Impact
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  2. CVE publishedCVE Program

    The CVE record was published.

  3. ADP timelineredhat-SADP

    Made public.

  4. ADP timelineredhat-SADP

    Reported to Red Hat.

  5. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

ADP provider summaries

CISA-ADPCISA ADP Vulnrichment
cvssV3_1other:ssvc
redhat-SADPwebkitgtk: Processing maliciously crafted web content may lead to an unexpected process crash
other:Red Hat severity ratingcvssV3_1
  • 2026-06-02T13:25:55.343Z: Reported to Red Hat.
  • 2026-06-02T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AppleSafari0Listed
AppleiOS and iPadOS0Listed
ApplemacOS0Listed
AppletvOS0Listed
ApplevisionOS0Listed
ApplewatchOS0Listed
Weakness

CWE details

CWE-416

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.

CWE-416 · source CWE mapping

Use After Free

Use After Free represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

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