CVE-2026-43656
📛 CVE Title
CVE-2026-43656
Description
An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination.
Overview
- State
- PUBLISHED
- Assigner (CNA)
- apple
- CVSS severity
- high
- CVSS score
- 7.3 / 10
- CVSS vector
AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L- Effective score
- 7.3 / 10 HIGH source: CNA overview
- CWE(s)
- —
- Reserved
- 2026-05-02
- Published
- 2026-05-11 22:08 UTC
- Last updated
- 2026-05-12 19:22 UTC
- Source
- https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/43xxx/CVE-2026-43656.json
- Linked Threat
- CVE-2026-43656 — CVE-2026-43656
NVD triage scoring NVD CVE 2.0
Layer NVD adds on top of the CNA's CVE record — published / last-modified timestamps, exploitability / impact subscores, and the FIRST.org EPSS probability that this CVE will be exploited in the wild in the next 30 days.
- EPSS score
- 0.0007 (probability of exploitation in next 30 days)
- EPSS percentile
- 20.56% vs all CVEs — higher = more likely to be exploited, as of 2026-05-24
NVD / KEV / EPSS data refreshed 2026-05-25 08:49 UTC. Re-run the 🛰 Backfill from NVD button above to refresh.
European Union Vulnerability Database ENISA EUVD
ENISA's official EU repository for curated vulnerability intelligence. Carries a separate identifier (EUVD-YYYY-NNNN) and frequently exposes an earlier-published description + CVSS than NVD does.
- EUVD ID
-
EUVD-2026-29302 - Assigner
- apple
- Published
- May 11, 2026, 8:08:00 PM
- Updated
- May 12, 2026, 5:22:14 PM
- EUVD base score (CVSS 3.1)
-
7.3 / 10
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L - EUVD-reported EPSS
- 0.0700
- Vendors
- Apple
- Products
-
macOS (0 <14.8.7)macOS (0 <26.5)iOS and iPadOS (0 <18.7.9)macOS (0 <15.7.7)iOS and iPadOS (0 <26.5)
ENISA description: An out-of-bounds write issue was addressed with improved input validation. This issue is fixed in iOS 18.7.9 and iPadOS 18.7.9, iOS 26.5 and iPadOS 26.5, macOS Sequoia 15.7.7, macOS Sonoma 14.8.7, macOS Tahoe 26.5. Parsing a maliciously crafted file may lead to an unexpected app termination.
Affected products (2)
| Vendor | Product | Versions | Platforms |
|---|---|---|---|
| Apple | iOS and iPadOS |
0 (affected),
0 (affected)
|
— |
| Apple | macOS |
0 (affected),
0 (affected),
0 (affected)
|
— |
Vendor references (5)
References embedded in the original CVE record by the assigning CNA.
MITRE references (5) cveawg.mitre.org
Pulled from MITRE's CVE Services API by the 🛰 Backfill from MITRE button.
Web references (7)
DuckDuckGo results ranked by threat-intel / vendor advisory domains. Generated by the 🔎 Find references (web) button above — same flow as the Remediations search.
- https://attackerkb.com/topics/CVE-2026-43656 rapid7:attackerkb.com
- https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-29302 rapid7:euvd.enisa.europa.eu
- http://cwe.mitre.org/data/definitions/787.html rapid7:cwe.mitre.org
- https://www.first.org/epss/ tenable:www.first.org
- https://isc.sans.edu/diary/rss/32976 tenable:isc.sans.edu
- https://nvd.nist.gov/vuln/detail/CVE-2026-43656 tenable:nvd.nist.gov
- https://www.cve.org/CVERecord?id=CVE-2026-43656 tenable:www.cve.org
Remediations (15)
Remediations are stored against the linked Threat row; the list below is deduplicated across both pages.
-
web:access.redhat.com
The mitigation methods below address both vulnerabilities that affect Red Hat products — CVE - 2026 -43284 (IPsec ESP) and CVE - 2026 -46300 (XFRM ESP-in-TCP). CVE - 2026 -43500 (rxrpc) does not affect Red Hat products and requires no mitigation .
2026-05-23 21:00 UTC -
web:cyberpress.org
The U.S. Cybersecurity and Infrastructure Security Agency (CISA) has added two actively exploited Microsoft Defender vulnerabilities to its Known Exploited Vulnerabilities (KEV) catalog, issuing an urgent remediation directive for federal agencies with a due date of June 3, 2026 .
2026-05-23 21:00 UTC -
web:krebsonsecurity.com
Microsoft expects that exploitation is more likely. May's Patch Tuesday is a welcome respite from April, which saw Microsoft fix a near-record 167 security flaws.
2026-05-23 21:00 UTC -
web:msrc.microsoft.com
Security Update Guide - Microsoft Security Response Center
2026-05-23 21:00 UTC -
web:support.servicenow.com
Overview The advisories below document publicly disclosed Common Vulnerabilities and Exposures ( CVEs ) in the Now Platform by ServiceNow. Because ServiceNow uses various methods to communicate vulnerability information, patches, and other fixes, customers should review family, security patch , and hotfix release notes, which are available at https://docs.servicenow.com, for a complete list of ...
2026-05-23 21:00 UTC -
web:www.bleepingcomputer.com
Today is Microsoft's April 2026 Patch Tuesday with security updates for 167 flaws, including 2 zero-day vulnerabilities.
2026-05-23 21:00 UTC -
web:www.oracle.com
This Critical Patch Update contains 481 new security patches across the product families listed below. Please note that an MOS note summarizing the content of this Critical Patch Update and other Oracle Software Security Assurance activities is located at April 2026 Critical Patch Update: Executive Summary and Analysis.
2026-05-23 21:00 UTC -
web:www.vulncheck.com
In February, VulnCheck introduced our 2025 Routinely Targeted Vulnerabilities list, a compilation of CVEs researched and exploited by a range of threat actors in 2025. Today, we're releasing a list of 2026 vulnerabilities that our analysts have determined qualify for "Routinely Targeted" status based on a combination of threat actor, ransomware, and botnet targeting, along with public ...
2026-05-23 21:00 UTC -
web:www.windowslatest.com
Windows 11 April 2026 update adds Narrator Copilot support, faster Settings, File Explorer fixes, and key security improvements.
2026-05-23 21:00 UTC -
web:zecurit.com
Get the complete breakdown of Microsoft's May 2026 Patch Tuesday. We analyze the latest security updates and all critical CVEs .
2026-05-23 21:00 UTC -
web:blog.qualys.com
With Qualys Policy Audit's out-of-the-box mitigation or Compensatory Controls, which reduce the risk of a vulnerability being exploited because the remediation ( fix / patch ) cannot be done immediately, these security controls are not recommended by any industry standards, such as CIS and DISA-STIG.
2026-05-26 02:52 UTC -
web:blog.talosintelligence.com
Microsoft has released its monthly security update for April 2026 , which includes 165 vulnerabilities affecting a wide range of products, including eight Microsoft marked as "critical." CVE - 2026 -23666 is a critical Denial of Service (DoS) vulnerability that affects the .NET framework. Successful exploitation could allow the attacker to deny service over the network. CVE - 2026 -32157 is a ...
2026-05-26 02:52 UTC -
web:blogs.oracle.com
For more information about the Critical Patch Update program, see the security vulnerability remediation practices page located on the Oracle Trust Center.
2026-05-26 02:52 UTC -
web:cyberscoop.com
Threats Microsoft addresses 137 vulnerabilities in May's Patch Tuesday, including 13 rated critical The high volume of vulnerabilities reflects a growing trend researchers have been anticipating as artificial intelligence models are deployed to find previously uncovered defects in code.
2026-05-26 02:52 UTC -
web:www.crowdstrike.com
Microsoft's April 2026 Patch Tuesday addresses 164 CVEs , featuring 8 Critical vulnerabilities, one exploited zero-day, and one disclosed zero-day.
2026-05-26 02:52 UTC
AI Forensic Analysis
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Raw JSON
The full cvelistV5 record. Download as CVE-2026-43656.json.
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