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CVE Record

CVE-2026-28953: The issue was addressed with improved memory handling.

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.5, iOS 18.7.9 and iPadOS 18.7.9, 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 high-severity memory handling issue in web content processing. A user who opens malicious web content could experience an unexpected process crash. The source bundle does not prove active exploitation or remote code execution, but the affected Apple ecosystem breadth makes patching important.

Executive priority

Treat as a high-priority patching item for Apple fleets and browsers, especially where users browse external sites. There is no provided evidence of active exploitation, so this is urgent hygiene rather than confirmed incident response.

Technical view

CVE-2026-28953 is described as a memory handling flaw associated with CWE-119 and CWE-120. The CVSS 3.1 score is 8.8 with network attack vector, low complexity, no privileges, and required user interaction. Apple lists fixes across Safari and multiple operating systems.

Likely exposure

Organizations may be exposed where Safari or Apple platforms remain below Safari 26.5, iOS/iPadOS 18.7.9 or 26.5, macOS Tahoe 26.5, tvOS 26.5, visionOS 26.5, or watchOS 26.5. Red Hat references exist, but product impact should be confirmed from Red Hat advisories.

Exploitation context

The provided evidence says maliciously crafted web content may trigger a process crash. KEV status is false, and the bundle includes no cited evidence of active exploitation. User interaction is required according to the CVSS vector.

Researcher notes

The public description is sparse: memory handling, crafted web content, and unexpected crash are the confirmed technical details. The affected version data in the bundle uses placeholder values, so rely on Apple and Red Hat advisories for exact product applicability.

Mitigation direction

  • Apply the Apple fixed versions listed in the advisory bundle.
  • Prioritize browsers and user endpoints that process untrusted web content.
  • Review Red Hat advisories for any applicable packaged dependency exposure.
  • Use vendor guidance for any product-specific mitigations not named here.

Validation and detection

  • Inventory Safari and Apple OS versions against the fixed release list.
  • Confirm patch deployment on managed macOS, iOS, iPadOS, watchOS, tvOS, and visionOS assets.
  • Check vulnerability scanners for CVE-2026-28953 coverage and stale detections.
  • Review Red Hat VEX and errata applicability before treating Linux systems as affected.
Prepared
Confidence
medium
Sources
12

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-119: 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.

Open ATT&CK lookup
cwe · low confidence lookup

CWE-120: 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.

Open ATT&CK lookup
cve · low confidence lookup

CVE-2026-28953 mapping review

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

Open ATT&CK lookup
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
20Source 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-2026-28953Attack 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
  • 2026-06-02T13:39:17.634Z: 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 iPadOS0, 0Listed
ApplemacOS0Listed
AppletvOS0Listed
ApplevisionOS0Listed
ApplewatchOS0Listed
Weakness

CWE details

CWE-119CWE-120

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