CVE-2026-20665: apple ios and ipados Protection Mechanism Failure
CVSS: 6.5v3.1MediumAnalyzed
AliasesUBUNTU-CVE-2026-20665DEBIAN-CVE-2026-20665
Published 25-03-2026Last modified 17-08-2026
Vulnerability summary
CVE-2026-20665 is a medium (CVSS 6.5) Protection Mechanism Failure vulnerability in apple ios and ipados. EPSS estimates a 0.61% chance of exploitation in the next 30 days, higher than 48.1% of scored vulnerabilities.
CVSS score
6.5/10
010
Medium · v3.1 (CVE.org)EPSS score
0.61%
0%100%
Low · 0.00 pp in 30 daysKEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded
Advisory lineage
Upstream 0 · Downstream 14 · Related 4Timeline
- 25-03-2026PublishedVulnerability first disclosed.
- 17-08-2026Last modifiedVulnerability information updated.
Description
This issue was addressed through improved state management. This issue is fixed in Safari 26.4, iOS 18.7.7 and iPadOS 18.7.7, iOS 26.4 and iPadOS 26.4, macOS Tahoe 26.4, tvOS 26.4, visionOS 26.4, watchOS 26.4. Processing maliciously crafted web content may prevent Content Security Policy from being enforced.
CVSS metrics
4 scores · 4 sources · 1 versionMedium 6.5Preferred score · CVE.org (CNA)
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:LSourcesAll 4 agree
- OSV · UbuntuEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- OSV · DebianEcosystem advisory · calculated6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
- NVDNIST6.5MediumCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:L
EPSS trend
Probability
0.61%
Chance of exploitation in the next 30 days
Percentile
48%
Versus all other CVEs
30-day change
0.00 pp
From 0.61% on 18-09-2026
18-09-202618-10-2026
EPSS score0.61%
Known exploited
Compare KEV catalogsNot in any of the 3 tracked catalogs.
Public exploits
0 foundNo public exploits indexed.
Weaknesses
CWE · root causeAffected systems
Apple8 products
- ios and ipados< 18.7.7 | < 26.4
- ipados< 18.7.7 | ≥ 26.0, < 26.4
- iphone_os< 18.7.7 | ≥ 26.0, < 26.4
- macos< 26.4
- safari< 26.4
Ubuntu5 products
- qtwebkit-opensource-srcAll versions (No fix recorded)
- qtwebkit-sourceAll versions (No fix recorded)
- webkit2gtkAll versions (No fix recorded) | < 2.52.3-0ubuntu0.24.04.1 | < 2.52.3-0ubuntu0.25.10.1 | < 2.52.3-0ubuntu0.26.04.2
- webkitgtkAll versions (No fix recorded)
- wpewebkitAll versions (No fix recorded)
Debian2 products
- webkit2gtkAll versions (No fix recorded) | < 2.52.3-2~deb13u1 | < 2.52.1-1
- wpewebkitAll versions (No fix recorded) | < 2.52.1-1
3 vendors · 15 products
