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Double Free in Apple libxslt Web Content Processing

IdentifiersCVE-2026-43706CWE-415

CVE-2026-43706 is a double-free vulnerability in Apple's handling of web content within libxslt. Apple states that processing maliciously crafted web content may trigger the flaw and cause an unexpected process crash. The issue affects Apple platforms including iOS, iPadOS, and macOS Tahoe prior to iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. Apple reports that the issue was addressed through improved memory management.

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ANALYST BRIEF

Impact, mitigation & remediation

What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.

Impact

What an attacker gets, and what they’ve been doing with it.

Successful exploitation can cause the targeted process handling the malicious web content to crash unexpectedly, resulting in denial of service for the affected application or content-processing context. Based on the provided information, the documented impact is process crash; no confirmed code execution or privilege escalation is stated in the source material.

Mitigation

If you can’t patch tonight, do this now.

Until patches can be applied, reduce exposure to untrusted web content, especially content that may invoke libxslt processing paths. Limit browsing to trusted sites and restrict use of untrusted embedded web content where feasible. No vendor-specific workaround beyond updating is provided in the supplied content.

Remediation

Patch, then assume compromise.

Apply Apple's security updates that fix the issue: iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. The vendor indicates the flaw was remediated through improved memory management in the affected component.
PUBLIC EXPLOITS

Exploits

No public exploits tracked yet. Mallory keeps watching.

VALID 0 / 0 TOTALView more in app

No public exploit code observed for this vulnerability.

EXPOSURE SURFACE

Affected products & vendors

Products and vendors Mallory has correlated with this vulnerability. Open in Mallory to drill down to specific CPE configurations and version ranges.

VendorProductType
AppleIosoperating_system
AppleIpadosoperating_system
AppleMacosoperating_system

Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.

ACTIVITY FEED

Recent activity

3 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.

3 SOURCESView more in app
What this page doesn’t show

The version that knows your environment.

This page is what’s public. Mallory adds the parts that aren’t: which of your assets are affected, which adversaries are exploiting it right now, which detections to deploy, and what to do tonight.
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Exposure mapping

Query your assets running an affected version, and investigate the blast radius.

Threat actor evidence

Every observed campaign linking this CVE to a named adversary.

Associated malware

Malware families riding this exploit, with evidence and IOCs.

Detection signatures

YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.

Vendor-by-vendor mapping

Cross-references every affected SKU, including bundled OEM variants.

Social activity

Community discussion across Reddit, Mastodon, and other social sources.

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-43706
NVD
nvd.nist.gov/vuln/detail/CVE-2026-43706
MITRE CWE · CWE-415
cwe.mitre.org