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CVE Record

CVE-2026-20656: A logic issue was addressed with improved validation.

A logic issue was addressed with improved validation. This issue is fixed in Safari 26.3, iOS 18.7.5 and iPadOS 18.7.5, macOS Tahoe 26.3. An app may be able to access a user's Safari history.

LowCVSS 3.3Not KEV-listedUpdated
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Glexia's TakeAutomated analysislow

Security readout for executives and security teams

Plain-English summary

CVE-2026-20656 is an Apple privacy issue where an app on a device could access a user’s Safari browsing history. Apple says the logic issue was fixed with improved validation in Safari 26.3, iOS/iPadOS 18.7.5, and macOS Tahoe 26.3. Severity is low, and no provided source reports active exploitation.

Executive priority

Handle through normal Apple patch management, not emergency response. The issue can expose browsing history, which may matter for privacy and sensitive roles, but it requires local app execution and has low CVSS severity.

Technical view

The CVE describes an authorization/validation flaw, mapped to CWE-285, allowing a local low-privileged app to read Safari history without user interaction. CVSS is 3.3: local attack vector, low complexity, low privileges required, confidentiality impact only. Apple’s advisory states the issue was addressed with improved validation.

Likely exposure

Exposure is most likely on Apple endpoints running Safari, iOS/iPadOS, or macOS Tahoe versions older than the fixed releases. The source bundle does not provide exact affected version ranges beyond the products and fixed versions.

Exploitation context

An attacker would need the ability to run an app locally on the target device. The reported impact is privacy-related data exposure, specifically Safari history. There is no KEV listing and no cited source indicating exploitation in the wild.

Researcher notes

Public details are limited. Apple describes a logic issue fixed with improved validation and does not provide affected version ranges, proof-of-concept details, or exploitation evidence in the supplied sources. Avoid assuming broader product impact beyond the listed Apple platforms.

Mitigation direction

  • Update Safari to 26.3 where applicable.
  • Update iOS and iPadOS devices to 18.7.5.
  • Update macOS Tahoe systems to 26.3.
  • Check Apple’s security pages for platform-specific update guidance.
  • Prioritize managed devices where untrusted apps may be installed.

Validation and detection

  • Inventory Apple devices and Safari versions in endpoint management tools.
  • Confirm installed versions meet or exceed Apple’s fixed releases.
  • Review MDM compliance status for iOS, iPadOS, and macOS Tahoe.
  • Check whether users can install unmanaged or untrusted apps.
  • Document exceptions and track them to Apple guidance.
Prepared
Confidence
medium
Sources
5

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

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cwe · low confidence lookup

CWE-285: 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-2026-20656 mapping review

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Vulnerability profileCVE Program record
Severity
Low
CVSS
3.3 (3.1)
Known Exploited
No
Published

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

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.

1CVSS vectors
0Timeline events
0ADP providers
4Source links

CVSS vector scores

1 official score

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
3.3CVSS 3.1LowCVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N1.81.4Primary CVE score

Vulnerability scoring details

Base CVSS 3.1 score

3.3Low
CVSS 3.1 vector shape for CVE-2026-20656Attack VectorAttack ComplexityPrivileges RequiredUser InteractionScopeConfidentiality ImpactIntegrity ImpactAvailability Impact

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

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

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
AppleSafari0Listed
AppleiOS and iPadOS0Listed
ApplemacOS0Listed
Weakness

CWE details

CWE-285

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