A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
CVE-2026-43776
HIGHPre-NVD 7.87.8—Trending — 5 sources updated this week
EchelonGraph scoreHIGH confidence
Score 7.8 from GitHub Security Advisory (severity: HIGH) published 2026-07-27. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 7.8; sources differ by 0.0.
Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
7.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
- High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 7.8Exploit: None knownExposed: 0
No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.
- CVSS v3
- 7.8
- EG Score
- 7.8(high)
- EG Risk
- 35(Track)EG Risk 35/100SSVC: 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 computedSeverity78% × 45%Exploitation0% × 40%Automatability0% × 15%Action: Routine — remediate on your standard cadence. - EPSS PROB
- 0%
- EPSS %ILE
- 4%
- KEV
- Not listed
Published
July 27, 2026
Last Modified
July 28, 2026
Advisory Details (3)
Auto-updated Jul 27, 2026No patch confirmed yet.
generic
About the security content of macOS Sequoia 15.7.8 - Apple Support
https://support.apple.com/en-us/128071generic
About the security content of macOS Tahoe 26.6 - Apple Support
https://support.apple.com/en-us/128067generic
About the security content of iOS 26.6 and iPadOS 26.6 - Apple Support
https://support.apple.com/en-us/128066Vendor Advisories for CVE-2026-43776(1)
These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.
Weakness Classification(1)
MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.
Data Freshness Timeline
(refreshed 13× in last 7d / 13× 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.
- 2026-07-28 19:46 UTCGHSA enrichment
- 2026-07-28 16:40 UTCEG score recompute
- 2026-07-28 16:40 UTCGHSA enrichment
- 2026-07-28 15:36 UTCEPSS rescore
- 2026-07-28 05:36 UTCGHSA enrichment
- 2026-07-28 04:35 UTCEG score recompute
- 2026-07-28 04:34 UTCGHSA enrichment
- 2026-07-27 22:25 UTCEG score recompute▲ 7.80
- 2026-07-27 22:25 UTCGHSA enrichment
- 2026-07-27 22:21 UTCNVD updateCVSS v3 → 7.8 · severity → HIGH
- 2026-07-27 21:19 UTCNVD update
- 2026-07-27 20:26 UTCEG score recompute
- 2026-07-27 20:24 UTCMITRE cvelistV5first tracked
Related CVEs(same CWE)
Same CWE
10 shownCWE-120
- CVE-2010-10016EG 10.0CRITICAL
- CVE-2012-10035EG 10.0CRITICAL
- CVE-2011-4862EG 10.0EPSS p100HIGH
- CVE-2008-3496EG 10.0HIGH
- CVE-2007-1770EG 10.0EPSS p97HIGH
- CVE-2002-1337EG 10.0EPSS p99HIGH
- CVE-2001-0554EG 10.0EPSS p98HIGH
- CVE-2001-0191EG 10.0EPSS p92HIGH
- CVE-1999-1237EG 10.0EPSS p94HIGH
- CVE-1999-0385EG 10.0EPSS p97HIGH
Frequently asked(5)
What is CVE-2026-43776?
CVE-2026-43776 is a high vulnerability published on July 27, 2026. A buffer overflow was addressed with improved bounds checking. This issue is fixed in iOS 26.6 and iPadOS 26.6, macOS Sequoia 15.7.8, macOS Tahoe 26.6. Processing a maliciously crafted file may lead to unexpected app termination or arbitrary code execution.
When was CVE-2026-43776 disclosed?
CVE-2026-43776 was first published in the National Vulnerability Database on July 27, 2026, with the most recent update on July 28, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-43776 actively exploited?
CVE-2026-43776 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 95.6% of all scored CVEs.
What is the CVSS score of CVE-2026-43776?
CVE-2026-43776 has a CVSS v3.1 base score of 7.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-43776?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-43776, 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-2026-43776
Is Your Infrastructure Affected by CVE-2026-43776?
EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.