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Out-of-bounds Access in Apple Web Content Processing

IdentifiersCVE-2026-28979CWE-125

CVE-2026-28979 is an out-of-bounds access vulnerability in Apple’s web content processing components. According to the provided Apple security information, processing maliciously crafted web content can trigger the flaw and lead to an unexpected process crash. Apple states the issue was addressed through improved bounds checking. The vulnerability affects Safari, iOS, iPadOS, and macOS Tahoe prior to the fixed releases Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2.

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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 may cause the targeted web content process or Safari-related process to crash unexpectedly, resulting in denial of service for the affected browsing session or application component. Based on the provided information, the documented impact is process crash; no evidence was provided here of code execution, privilege escalation, or data disclosure for this specific CVE.

Mitigation

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

If immediate patching is not possible, reduce exposure by limiting use of untrusted web content and restricting browsing to trusted sites on affected devices until updates can be applied. Because the issue is triggered by maliciously crafted web content, temporary mitigations include minimizing Safari/webview exposure where operationally feasible. No vendor-specific workaround beyond updating was provided in the supplied content.

Remediation

Patch, then assume compromise.

Upgrade affected systems to the vendor-fixed versions: Safari 26.5.2, iOS 26.5.2, iPadOS 26.5.2, and macOS Tahoe 26.5.2. Apple indicates the fix consists of improved bounds checking in the affected web content handling code.
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
AppleIpadosoperating_system
AppleIphone Osoperating_system
AppleMacos Tahoeoperating_system
AppleSafariapplication

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

ACTIVITY FEED

Recent activity

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

5 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 activity2

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

EXTERNAL REFERENCES
MITRE CVE
cve.org · CVE-2026-28979
NVD
nvd.nist.gov/vuln/detail/CVE-2026-28979
MITRE CWE · CWE-125
cwe.mitre.org