LowCVE-2026-64782

    Apple Safari: Memory Corruption (CVE-2026-64782)

    Published Last modified Sources: SUSE, Debian, Red Hat, BSI, CVE.org

    What is affected, what to do

    A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.

    Update Apple Safari to version 26.6.1, Apple iOS and iPadOS to version 18.7.10, Apple iOS and iPadOS to version 26.6.1.

    Affected
    • Apple Safari lt *..26.6.1
    • Apple iOS and iPadOS lt *..18.7.10
    • Apple iOS and iPadOS lt *..26.6.1
    • Apple macOS lt *..26.6.2
    • Apple visionOS lt *..27
    Fixed in
    • Apple Safari 26.6.1
    • Apple iOS and iPadOS 18.7.10
    • Apple iOS and iPadOS 26.6.1
    • Apple macOS 26.6.2
    • Apple visionOS 27

    Not sure whether and how you are affected? Ask a question about this vulnerability

    Metrics

    3.1

    Priority

    XIEM Effective CVSS: highest available CVSS rating from NVD and vendor data.

    Source: Vendor (CNA), CVSS v3

    3.1

    CVSS v3

    Severity Low on the scale from 0 to 10.

    Source: SUSE, Debian, Red Hat, BSI, CVE.org

    0.4 %

    EPSS score

    Low — model estimates < 1% exploitation likelihood.

    Source: FIRST EPSS, percentile 37.3

    Show all metrics
    Severity
    Low
    Priority (0–325)

    The priority score is a consolidated metric that condenses several individual signals into a single, action-guiding ranking: technical severity (CVSS), exploitation likelihood (EPSS), known-exploited status (KEV) and the context of the affected asset. The aim is to answer the only truly important question in vulnerability management: what first?

    Read in glossary
    50.10 Methodology
    Exploit maturity

    An exploit is code or a technique that specifically uses a concrete vulnerability to force unintended behaviour — such as executing code or escalating privileges. It is the tool that turns a theoretical flaw into a practical attack.

    Read in glossary
    no public PoC known
    XIEM Effective CVSS

    XIEM® is the tiered managed-security operating model from NEOSEC and a registered trademark of NEOSEC GmbH. It extends classic SIEM — the central collection, normalisation and correlation of security-relevant events — with endpoint forensics, network visibility and deception technology, and consolidates them into three building tiers: Sentry, Orchestrate and Command.

    Read in glossary
    3.1 Methodology
    CVSS v3

    CVSS is the globally established, open standard for assessing the technical severity of a vulnerability on a scale from 0 to 10. It describes how easily a flaw can be exploited and what damage it can cause — but not how likely its actual exploitation is. CVSS and the complementary EPSS deliberately answer different questions.

    Read in glossary
    3.1
    EPSS score

    The EPSS score is the absolute model output for an individual vulnerability: the estimated probability of real-world exploitation within the next 30 days, expressed as a value between 0 and 1 (i.e. 0 % to 100 %). A score of 0.42 means „the model estimates a 42 % chance of real-world exploitation within 30 days“.

    Read in glossary
    0.4 %
    Low — model estimates < 1% exploitation likelihood.
    EPSS percentile

    The EPSS percentile is the relative position of a vulnerability within all EPSS-scored CVEs, expressed as a value between 0 and 1. A percentile of 0.90 means „this CVE has a higher EPSS score than 90 % of all other scored CVEs“. Unlike the EPSS score, it is not a probability — but a positioning within a ranking.

    Read in glossary
    37.3
    High — this CVE ranks above the median of all CVEs scored today (rank ≥ 36%).
    KEV status

    The KEV catalogue is a list maintained by the US authority CISA of vulnerabilities for which active exploitation in the wild has been confirmed. It answers not the question „how severe?“ but „is it already being attacked?“ — thereby sharply prioritising patching.

    Read in glossary
    —
    Published
    CISA assessment (SSVC)
    Exploitation: none known · not automatable · Technical impact: partial
    Source: CISA Vulnrichment, as of 18 August 2026
    CWE

    CWE is a catalogue of typical weakness types in software and hardware — such as flawed input validation, unsafe memory handling or poor authentication. Where a CVE names a concrete vulnerability in a concrete product, a CWE describes the underlying class of defect.

    Read in glossary
    CWE-362

    Detection rules

    No NEOSEC detection rule is available for this vulnerability yet.

    Classification under NIS2 and CRA

    Rule-based classification from exploitation status and severity. It does not replace a case-by-case assessment.

    NIS2

    NIS2 is EU Directive (EU) 2022/2555 to raise the level of cybersecurity across the Union. It substantially broadens obligations compared with the first NIS directive: more sectors, mandatory risk management, staged reporting duties and personal accountability of senior management.

    Read in glossary
    Handle the vulnerability in regular vulnerability handling under Art. 21(2)(e) NIS2.
    CRA

    The CRA is EU Regulation (EU) 2024/2847 setting horizontal cybersecurity requirements for „products with digital elements“ — from industrial controllers and software to connected consumer devices. For the first time manufacturers must ensure security across the entire product lifecycle, handle vulnerabilities and provide security updates.

    Read in glossary
    From 11.12.2027, Annex I Part II CRA requires manufacturers of affected products with digital elements to handle vulnerabilities without delay and provide security updates.
    ISO/IEC 27001

    ISO/IEC 27001 is the internationally leading standard for an information security management system (ISMS). It describes a risk-based, process-oriented framework to systematically plan, implement, review and improve information security.

    Read in glossary
    Control A.8.8, management of technical vulnerabilities: assess relevance to your systems, plan remediation and keep evidence.

    Description

    A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.

    Source: suse_csaf, Debian Security Advisories, redhat_csaf, BSI WID Portal, BSI CSAF, cvelistv5, NVD (NIST)

    Affected products

    The following versions are affected. Older releases of the same product line are also vulnerable unless stated otherwise.

    Affected products
    Affected versionsFixed in
    AppleiOS and iPadOS
    • < 18.7.10
    • < 26.6.1
    • 18.7.10
    • 26.6.1
    ApplemacOS
    • < 26.6.2
    • 26.6.2
    AppleSafari
    • < 26.6.1
    • 26.6.1
    ApplevisionOS
    • < 27
    • 27
    applesafari
    • < 26.6.1
    • 26.6.1
    Open SourceWebKitGTK
    • < 2.54.0
    • 2.54.0

    Vendors and products

    Affected operating systems

    Affected operating systems
    Linuxdebianwebkit2gtktrixie
    macOSapplemacos—
    Mobileappleiphone_os—
    Otherappleipados—

    Weakness classes (CWE)

    • CWE-362Concurrent Execution using Shared Resource with Improper Synchronization ('Race Condition')

      Class

      The product contains a concurrent code sequence that requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence operating concurrently.

      Entry at MITRE CWE-362

    References & sources

    Changes to this CVE

    Who changed this CVE and when: NVD (analysis, affected products, CVSS), the CVE publisher (CNA) and additional providers such as CISA (ADP).

    1. Record modifiedApple

      Description added or changed

      Show 15 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Descriptionchanged
      A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.
      A memory corruption vulnerability was addressed with improved locking. This issue is fixed in Safari 26.6.1, iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2, visionOS 27. Processing maliciously crafted web content may lead to an unexpected Safari crash.
      Affected versions (publisher)added
      —
      Affected value modified. <a href="https://github.com/CVEProject/cvelistV5/blob/main/cves/2026/64xxx/CVE-2026-64782.json">CVE-2026-64782</a>
      Referenceadded
      —
      https://support.apple.com/en-us/148281
      Referenceadded
      —
      https://support.apple.com/en-us/148282
      Referenceadded
      —
      https://support.apple.com/en-us/148286
      Referenceadded
      —
      https://support.apple.com/en-us/148287
      Referenceadded
      —
      https://support.apple.com/en-us/149038
      Referenceremoved
      https://support.apple.com/en-us/148281
      —
      Referenceremoved
      https://support.apple.com/en-us/148282
      —
      Referenceremoved
      https://support.apple.com/en-us/148286
      —
      Referenceremoved
      https://support.apple.com/en-us/148287
      —
      Reference typeremoved
      https://support.apple.com/en-us/148281 Types: Release Notes, Vendor Advisory
      —
      Reference typeremoved
      https://support.apple.com/en-us/148282 Types: Release Notes, Vendor Advisory
      —
      Reference typeremoved
      https://support.apple.com/en-us/148286 Types: Release Notes, Vendor Advisory
      —
      Reference typeremoved
      https://support.apple.com/en-us/148287 Types: Release Notes, Vendor Advisory
      —

      Source identifier: product-security@apple.com

    2. Record modifiedCISA ADP

      CVSS V3.1: AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L

      CISA assessment (SSVC): exploitation: none known, automatable: no

      Weakness type: CWE-362

      Show 3 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      CVSSadded
      —
      AV:N/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:L
      Weakness type (CWE)added
      —
      CWE-362
      SSVC assessmentadded
      —
      {"id":"CVE-2026-64782","role":"CISA Coordinator","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"version":"2.0.3","timestamp":"2026-08-18T13:01:10.872795Z"}

      Source identifier: 134c704f-9b21-4f2e-91b3-4a467353bcc0

    3. ReceivedApple

      Description added or changed

      Show 5 original changes
      Individual changes of this event as published by NVD
      TypeActionBeforeAfter
      Affected versions (publisher)added
      —
      iOS and iPadOS, macOS
      Descriptionadded
      —
      A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 18.7.10 and iPadOS 18.7.10, iOS 26.6.1 and iPadOS 26.6.1, macOS Tahoe 26.6.2. Processing maliciously crafted web content may lead to an unexpected Safari crash.
      Referenceadded
      —
      https://support.apple.com/en-us/148281
      Referenceadded
      —
      https://support.apple.com/en-us/148282
      Referenceadded
      —
      https://support.apple.com/en-us/148287

      Source identifier: product-security@apple.com

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