CVE-2026-43706: A double free issue was addressed with improved memory management

Recommended actionScheduled

Medium technical severity with no CISA KEV confirmation; remediate through the normal risk-based patch cycle unless local exposure raises the priority.

Fix not verified

What, why and how

A double free issue was addressed with improved memory management. This issue is fixed in iOS 26.5.2 and iPadOS 26.5.2, macOS Sequoia 15.7.8, macOS Sonoma 14.8.8, macOS Tahoe 26.5.2, tvOS 26.6, visionOS 26.6, watchOS 26.6. Processing maliciously crafted web content may lead to an unexpected process crash.

What

Why

The product calls free() twice on the same memory address.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may disrupt the affected service.

What

Why

The product calls free() twice on the same memory address.

How

An attacker operating through a network path may attempt exploitation without authentication after a user interaction. If successful, the issue may disrupt the affected service.

Exploit reality and attack path

CVSS severity, EPSS forecast probability, public exploit material and CISA-confirmed exploitation are separate signals.

Observed exploitation

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

No confirmed evidence

No CISA KEV match was present at the last successful refresh. This means no confirmation from that source, not proof of no exploitation.

Public PoC / exploit material

Confirmed exploitation and public exploit material are separate signals. Attacks can occur without public proof-of-concept or exploit code.

None recorded

No exploit-tagged reference or CISA SSVC proof-of-concept state is currently recorded. Research may still exist outside the structured feeds.

Likely attack path: a network path → Double Free → disrupt the affected service
Attack surface: Network
Privileges required: None: unauthenticated exploitation is possible
User interaction: Required interaction required
Attack complexity: Low: no specialised conditions are recorded
Security boundary: Unchanged: impact remains within the vulnerable component's security authority
Weakness ? CWE means Common Weakness Enumeration: a standard category for the underlying weakness.: CWE-415 ↗
CWE-415: Double Free. The product calls free() twice on the same memory address.
CVSS vector ? CVSS means Common Vulnerability Scoring System. The vector records the metric values used to calculate technical severity.: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
Common Vulnerability Scoring System 3.1: the compact vector below is decoded into plain language.
AVNetworkAttack vector: The vulnerable component can be reached over a network.ACLowAttack complexity: No specialised conditions are required beyond attacker-controlled input.PRNonePrivileges required: The attacker does not need an account or existing privileges.UIRequiredUser interaction: Another user must perform an action for exploitation to succeed.SUnchangedScope: The security impact remains within the vulnerable component's authority.CNoneConfidentiality impact: No direct loss is represented by this metric.INoneIntegrity impact: No direct loss is represented by this metric.AHighAvailability impact: A successful attack can cause a major loss.
Post-exploitation / living off the land: No specific living-off-the-land technique is confirmed in the structured sources. Monitor normal administration tools for activity inconsistent with the affected service's baseline.

NetworkUnauthenticatedDenial of serviceCWE-415

Official authority intelligence

Only matched European and national findings are included. Language selectors and unavailable sources are omitted.

ENISA EUVD · EUVD-2026-40208Official EUVD mapping

0 linked advisory records.

Official EUVD record ↗

BSI · German · WID-SEC-2026-2543Apple macOS (Tahoe, Sonoma und Sequoia): Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apple macOS Tahoe, Sonoma und Sequoia ausnutzen, um seine Privilegien zu erhöhen, um beliebigen Programmcode auszuführen, um einen Denial of Service Angriff durchzuführen, um Informationen offenzulegen, um Dateien zu manipulieren, und um Sicherheitsvorkehrungen zu umgehen.

Official advisory ↗

BSI · German · WID-SEC-2026-2134Apple iOS und iPadOS: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apple iOS und Apple iPadOS ausnutzen, um Speicherbeschädigungen zu verursachen, Daten zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory ↗

BSI · German · WID-SEC-2026-2128Apple macOS Tahoe: Mehrere Schwachstellen

Ein Angreifer kann mehrere Schwachstellen in Apple macOS Tahoe ausnutzen, um Dateien zu manipulieren, vertrauliche Informationen offenzulegen oder einen Denial-of-Service-Zustand zu verursachen.

Official advisory ↗

Cyber Security Agency of Singapore · English · CSA-SB-20260701Security Bulletin 1 July 2026

The Cyber Security Agency of Singapore included this CVE in its official Security Bulletin 1 July 2026, published on 1 July 2026. Open the linked bulletin for the product, severity and reference information published in that issue.

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0938Multiples vulnérabilités dans les produits Apple

d?id=CVE-2026-43693 Référence CVE CVE-2026-43694 https://www.cve.org/CVERecord?id=CVE-2026-43694 Référence CVE CVE-2026-43698 https://www.cve.org/CVERecord?id=CVE-2026-43698 Référence CVE CVE-2026-43699 https://www.cve.org/CVERecord?id=CVE-2026-43699 Référence CVE CVE-2026-43700 https://www.cve.org/CVERecord?id=CVE-2026-43700 Référence CVE CVE-2026-43701 https://www.cve.org/CVERecord?id=CVE-2026-43701 Référence CVE CVE-2026-43703 https://www.cve.org/CVERecord?id=CVE-2026-43703 Référence CVE CVE-2026-43704 https://www.cve.org/CVERecord?id=CVE-2026-43704 Référence CVE CVE-2026-43705 https://www.cve.org/CVERecord?id=CVE-2026-43705 Référence CVE CVE-2026-43706 https://www.cve.org/CVERecord?id=CVE-2026-43706 Référence CVE CVE-2026-43707 https://www.cve.org/CVERecord?id=CVE-2026-43707 Référence CVE CVE-2026-43708 https://www.cve.org/CVERecord?id=CVE-2026-43708 Référence CVE CVE-2026-43709 https://www.cve.org/CVERecord?id=CVE-2026-43709 Référence CVE CVE-2026-43710 https://www.cve.org/CVERecord?id=CVE-2026-43710 Référence CVE CVE-2026-43711 https://www.cve.org/CVERecord?id=CVE-2026-43711 Référence CVE CVE-2026-43712 https://www.cve.org/CVERecord?id=CVE-2026-43712 Référence CVE CVE-2026-43713 https://www.cve.org/CVERecord?id=CVE-2026-43713 Référence CVE CVE-2026-43714 https://www.cve.org/CVERecord?id=

Official advisory ↗

CERT-FR · French · CERTFR-2026-AVI-0818Multiples vulnérabilités dans les produits Apple

d?id=CVE-2026-39872 Référence CVE CVE-2026-43663 https://www.cve.org/CVERecord?id=CVE-2026-43663 Référence CVE CVE-2026-43676 https://www.cve.org/CVERecord?id=CVE-2026-43676 Référence CVE CVE-2026-43699 https://www.cve.org/CVERecord?id=CVE-2026-43699 Référence CVE CVE-2026-43700 https://www.cve.org/CVERecord?id=CVE-2026-43700 Référence CVE CVE-2026-43701 https://www.cve.org/CVERecord?id=CVE-2026-43701 Référence CVE CVE-2026-43703 https://www.cve.org/CVERecord?id=CVE-2026-43703 Référence CVE CVE-2026-43704 https://www.cve.org/CVERecord?id=CVE-2026-43704 Référence CVE CVE-2026-43705 https://www.cve.org/CVERecord?id=CVE-2026-43705 Référence CVE CVE-2026-43706 https://www.cve.org/CVERecord?id=CVE-2026-43706 Référence CVE CVE-2026-43707 https://www.cve.org/CVERecord?id=CVE-2026-43707 Référence CVE CVE-2026-43708 https://www.cve.org/CVERecord?id=CVE-2026-43708 Référence CVE CVE-2026-43709 https://www.cve.org/CVERecord?id=CVE-2026-43709 Référence CVE CVE-2026-43712 https://www.cve.org/CVERecord?id=CVE-2026-43712 Référence CVE CVE-2026-43713 https://www.cve.org/CVERecord?id=CVE-2026-43713 Référence CVE CVE-2026-43715 https://www.cve.org/CVERecord?id=CVE-2026-43715 Référence CVE CVE-2026-43716 https://www.cve.org/CVERecord?id=CVE-2026-43716 Référence CVE CVE-2026-43717 https://www.cve.org/CVERecord?id=

Official advisory ↗

JVN iPedia · Japanese · JVNDB-2026-021723アップルのiPadOS等の複数製品における二重解放に関する脆弱性

二重解放の問題は、改善されたメモリ管理によって対処されました。この問題はiOS 26.5.2およびiPadOS 26.5.2、macOS Tahoe 26.5.2で修正されました。悪意のある細工が施されたウェブコンテンツを処理した結果、予期しないプロセスクラッシュが発生する可能性があります。

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0267Kwetsbaarheden verholpen in Apple MacOS

A double free vulnerability in various Apple operating systems was fixed by enhancing memory management to prevent unexpected process crashes triggered by malicious web content.

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0215Kwetsbaarheden verholpen in Apple iOS en iPadOS

A double free vulnerability causing unexpected process crashes when processing malicious web content was fixed in iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 through improved memory management.

Official advisory ↗

NCSC-NL · Dutch · NCSC-2026-0214Kwetsbaarheden verholpen in Apple MacOS

A double free vulnerability causing unexpected process crashes when processing malicious web content was fixed in iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2 through improved memory management.

Official advisory ↗

Patch and workaround

Operational remediation based on structured source evidence.

Status ? Patch availability is based on structured fixed-version fields and authoritative update references. If no fix is verified, check the vendor advisory before making a change.: Fix not verified
Affected: iOS and iPadOS: < 26.5.2
macOS: < 14.8.8, < 15.7.8, < 26.5.2
tvOS: < 26.6
visionOS: < 26.6
watchOS: < 26.6
Fixed: No fixed version is explicitly recorded in the structured CVE data.
Action: No verified patch reference is present in the current structured sources. Check the vendor advisory before making a change.
Workaround: No verified workaround is recorded. If business-safe, reduce exposure to the affected interface and allow only trusted sources until authoritative guidance is available.

Evidence and provenance

Published 29 Jun 2026 · Last source change 27 Jul 2026, 20:14 UTC · CWE-415 · Double Free

CVE recordCVE.org · 5.2

CVSS sourceCISA ADP

EPSS source

The date BlackTree first stored a score for this CVE from the daily FIRST EPSS feed.

FIRST · tracked since 2026-08-14

European sourceENISA EUVD · EUVD-2026-40208

Product sourceCNA

Remediation sourceCVE/CNA references

CWE sourceCISA ADP

NVD statusNVD modified after enrichment

Core structured fields are present and their contributing authorities are shown above.

Material change intelligence

What changed after publication

View recent updates ↗

No material field changes have been recorded since change tracking began. Routine source refreshes and cosmetic edits are intentionally excluded.

2026-06-29CVE published

ENISA EUVD · EUVD-2026-40208↗CVE authority or vendor reference↗Vendor advisory↗Official CVE record (CNA and ADP data)↗NVD record↗

Technical terms and abbreviations used in this report

CVE: Common Vulnerabilities and Exposures: the public identifier for one disclosed vulnerability.
CVSS: Common Vulnerability Scoring System: a technical severity framework; it is not patching priority by itself.
EPSS: Exploit Prediction Scoring System: FIRST's estimate of the probability that exploitation activity will be observed in the next 30 days; it is a forecast, not confirmation.
CWE: Common Weakness Enumeration: the standard category describing the underlying software or hardware weakness.
CNA: CVE Numbering Authority: an organisation authorised to assign and publish CVE records.
CISA ADP: Cybersecurity and Infrastructure Security Agency Authorized Data Publisher: structured enrichment added to a CVE record.
NVD: National Vulnerability Database: NIST's enrichment service for CVE records.
CERT / CSIRT: A computer security incident response team that publishes warnings or coordinates incident response.
PoC: Proof of concept: public material that demonstrates or helps reproduce exploitation.
CSAF: Common Security Advisory Framework: a machine-readable format for security advisories.
LoTL: Living off the land: abuse of legitimate tools or system functions during an attack.

A double free issue was addressed with improved memory management

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

ENISA European Vulnerability Database

EUVD-2026-40208

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

What changed after publication

A double free issue was addressed with improved memory management

National CERT insights ?CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.

EUVD-2026-40208

What, why and how

Exploit reality and attack path

Official authority intelligence

Patch and workaround

Evidence and provenance

National CERT insights
?
CERT means Computer Emergency Response Team; CSIRT is the closely related term Computer Security Incident Response Team.