CVE-2026-20688

CRITICALPre-NVD 9.39.3—
EchelonGraph scoreMEDIUM confidence

Score 9.3 from GitHub Security Advisory (severity: CRITICAL) published 2026-03-25. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.3; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, ghsa
Trending — 3 sources updated this week
9.3EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 9.3Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

A path handling issue was addressed with improved validation. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4. An app may be able to break out of its sandbox.

CVSS v3
9.3
EG Score
9.3(medium)
EG Risk
46(Track)
EG Risk 46/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity93% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
20%
KEV
Not listed

Published

March 25, 2026

Last Modified

June 17, 2026

Advisory Details (5)

Auto-updated Jul 27, 2026
No patch confirmed yet.
generic

About the security content of visionOS 26.4 - Apple Support

https://support.apple.com/en-us/126799
generic

About the security content of macOS Sonoma 14.8.5 - Apple Support

https://support.apple.com/en-us/126796
generic

About the security content of macOS Sequoia 15.7.5 - Apple Support

https://support.apple.com/en-us/126795
generic

About the security content of macOS Tahoe 26.4 - Apple Support

https://support.apple.com/en-us/126794
generic

About the security content of iOS 26.4 and iPadOS 26.4 - Apple Support

https://support.apple.com/en-us/126792

Weakness Classification(1)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 4× in last 7d / 4× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-08-01 04:15 UTCEPSS rescore
  2. 2026-07-30 01:30 UTCEPSS rescore
  3. 2026-07-27 14:27 UTCEG score recompute
  4. 2026-07-27 14:27 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20688?
CVE-2026-20688 is a critical vulnerability published on March 25, 2026. A path handling issue was addressed with improved validation. This issue is fixed in iOS 26.4 and iPadOS 26.4, macOS Sequoia 15.7.5, macOS Sonoma 14.8.5, macOS Tahoe 26.4, visionOS 26.4. An app may be able to break out of its sandbox.
When was CVE-2026-20688 disclosed?
CVE-2026-20688 was first published in the National Vulnerability Database on March 25, 2026, with the most recent update on June 17, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20688 actively exploited?
CVE-2026-20688 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 80.3% of all scored CVEs.
What is the CVSS score of CVE-2026-20688?
CVE-2026-20688 has a CVSS v3.1 base score of 9.3 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-20688?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20688, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-20688

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