What is CVE-2026-20686?

CVE-2026-20686 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-03-25.

How severe is CVE-2026-20686?

Medium severity. CVSS v3 base score is 5.3 out of 10.

Improper input validation in Apple iOS And Ipados

CVE-2026-20686

This issue was addressed with improved input validation. This issue is fixed in iOS 26.3 and iPadOS 26.3. An app may be able to access sensitive user data.

Vulnerability class: Drupalgeddon 2 (CVE-2018-7600)

Published 2026-03-25 · last modified 2026-06-17.

CVSS v3 metric

CVSS v3 base score 5.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N.

EPSS exploit prediction

EPSS: 0.002 (8.0th percentile), scored 2026-10-02.

Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 8th percentile — 8.0% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.

EPSS over last 30 days · oldest: 0.002 · newest: 0.002 · change: 0.000

Affected products

Weakness classification (CWE)

CWE-20 — Improper Input Validation

References

support.apple.com/en-us/126346 (Release Notes, Vendor Advisory)

Frequently asked questions

What is CVE-2026-20686?: CVE-2026-20686 is a medium-severity vulnerability in Apple iOS And Ipados, classified under Improper Input Validation. CVSS score: 5.3/10. Published 2026-03-25.
How severe is CVE-2026-20686?: Medium severity. CVSS v3 base score is 5.3 out of 10.