Identifying information leak to Live Caller ID app extensions in iOS/iPadOS (Call History)
CVE-2026-20638 is an Apple iOS/iPadOS Call History privacy issue where a logic flaw allowed Live Caller ID app extensions to receive identifying information even when the user had turned Live Caller ID app extensions off. Apple describes this as a logic issue addressed with improved checks, and reports it is fixed in iOS 26.3 and iPadOS 26.3.
Are you exposed to this one?
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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.
Mitigation
If you can’t patch tonight, do this now.
Remediation
Patch, then assume compromise.
Exploits
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
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.
Vendor-confirmed product mapping. Mallory continuously reconciles this list against your asset inventory.
Recent activity
4 sources tracked across advisories, community write-ups, and news. New activity surfaces here as Mallory finds it.
Privacy leak where identifying information may be exposed to Live Caller ID extensions despite being turned off.
Privacy leak where Live Caller ID extensions could receive identifying info even when extensions are turned off; fixed via improved checks.
The version that knows your environment.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
Community discussion across Reddit, Mastodon, and other social sources.