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CVE Record

CVE-2026-20652: The issue was addressed with improved memory handling.

The issue was addressed with improved memory handling. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, iOS 26.3 and iPadOS 26.3, macOS Tahoe 26.3, visionOS 26.3. A remote attacker may be able to cause a denial-of-service.

HighCVSS 7.5Not KEV-listedUpdated
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Glexia's TakeAutomated analysishigh

Security readout for executives and security teams

Plain-English summary

This Apple vulnerability can let a remote attacker crash affected systems or applications. The issue is availability-only in the supplied CVSS data, with no confidentiality or integrity impact stated. Apple says it fixed the issue with improved memory handling in listed Safari, iOS/iPadOS, macOS Tahoe, and visionOS releases.

Executive priority

Prioritize routine-to-accelerated patching for exposed Apple fleets, especially internet-facing or business-critical devices. This is not evidenced as actively exploited in the provided sources, but the unauthenticated remote denial-of-service profile supports prompt remediation.

Technical view

CVE-2026-20652 is a remotely reachable denial-of-service issue tied to memory handling. The CVSS vector is AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H, indicating network access, low complexity, no privileges, no user interaction, and high availability impact. The bundle maps it to CWE-120 and CWE-400.

Likely exposure

Organizations using Apple endpoints below Safari 26.3, iOS/iPadOS 18.7.5, iOS/iPadOS 26.3, macOS Tahoe 26.3, or visionOS 26.3 may be exposed. The bundle also includes Red Hat tracking and errata references, but it does not identify affected Red Hat products in the provided text.

Exploitation context

The supplied data does not show CISA KEV listing or any cited active exploitation. Treat this as a high-priority denial-of-service risk because exploitation is remote, unauthenticated, and does not require user interaction according to the CVSS vector.

Researcher notes

Evidence is limited to vendor-style descriptions and CVSS metadata. The source bundle does not provide root-cause detail, vulnerable version ranges, proof of exploitation, or workaround guidance beyond fixed releases. Avoid assuming code execution or data compromise from this record alone.

Mitigation direction

  • Update Safari to 26.3 where applicable.
  • Update iOS and iPadOS to 18.7.5 or 26.3.
  • Update macOS Tahoe systems to 26.3.
  • Update visionOS devices to 26.3.
  • Review Red Hat advisories for downstream applicability.
  • Monitor Apple guidance for any revised mitigation notes.

Validation and detection

  • Inventory Apple devices and browser versions across managed endpoints.
  • Confirm installed versions meet or exceed Apple's fixed releases.
  • Check vulnerability scanners for CVE-2026-20652 detection coverage.
  • Review Red Hat CVE and errata pages if Red Hat systems are in scope.
  • Track helpdesk or monitoring signals for unexplained service crashes.
Prepared
Confidence
high
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-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
cwe · low confidence lookup

CWE-400: 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-2026-20652 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
7.5 (3.1)
Known Exploited
No
Published

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6CISA-ADP
7.5CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H3.93.6redhat-SADP

Vulnerability scoring details

Base CVSS 3.1 score

7.5High
CVSS 3.1 vector shape for CVE-2026-20652Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/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: A remote attacker may be able to cause a denial-of-service
other:Red Hat severity ratingcvssV3_1
  • 2026-03-18T20:21:51.189Z: Reported to Red Hat.
  • 2026-03-18T00:00:00.000Z: Made public.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AppleSafari0Listed
AppleiOS and iPadOS0, 0Listed
ApplemacOS0Listed
ApplevisionOS0Listed
Weakness

CWE details

CWE-120CWE-400

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

CWE-120 · source CWE mapping

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow')

Buffer Copy without Checking Size of Input ('Classic Buffer Overflow') represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs
CWE-400 · source CWE mapping

Uncontrolled Resource Consumption

Uncontrolled Resource Consumption represents a recurring weakness pattern that can create exploitable paths when design, validation, or implementation controls are missing.

Open CWE intelligenceSame-CWE CVEs