ExploitedIn CISA KEVFix available

CVE-2023-43000

Q: Is CVE-2023-43000 actively exploited?

Yes. CVE-2023-43000 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-03-26.

Q: What is the CVSS score for CVE-2023-43000?

CVE-2023-43000 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Exploitation confirmed. First attested on 2026-03-05 by CISA-ADP, CISA KEV, GCVE · kevintel.

Published2025-11-05
Fixed in16.6 · 15.8.7
WeaknessCWE-416

Am I affected?

With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.

Description

A use-after-free issue was addressed with improved memory management. This issue is fixed in macOS Ventura 13.5, iOS 16.6 and iPadOS 16.6, Safari 16.6, iOS 15.8.7 and iPadOS 15.8.7. Processing maliciously crafted web content may lead to memory corruption.

Timeline

dates in UTC

2025-11-0519:15CVE publishedNVD
2026-03-05Added to the CISA KEV catalogCISA KEV
2026-03-05Listed as exploited by GCVEGCVE
2026-03-05Exploitation first reportedCISA KEV
2026-03-0605:01SSVC exploitation set to activeCISA-ADP

Observed activity

isMalicious corpus · updated 2026-10-23 21:37 UTC

Indicators tagged with this CVE, per day0 indicators over 7 days

Block these indicators

Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2023-43000?format=txt
CSV export: https://api.ismalicious.com/edl/cve/CVE-2023-43000?format=csv
TAXII collection of exploited CVEs
The EDL and CSV take an API key on the Pro plan.

Versions per branch

NVD

Apple ipados

Branch	Affected	Fixed in	Source
16.x	≥ 16.0, < 16.6	16.6	NVD
15.8	< 15.8.7	15.8.7	NVD

Apple iphone os

Branch	Affected	Fixed in	Source
16.x	≥ 16.0, < 16.6	16.6	NVD
15.8	< 15.8.7	15.8.7	NVD

Apple macos

Branch	Affected	Fixed in	Source
13.5	< 13.5	13.5	NVD

1 more product in the sources.

as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.

Distribution builds and vendor advisories

Packages from OSV.dev and products from the vendors' CSAF advisories.

version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.

Packages

webkit2gtk3AlmaLinux:9all versions · fixed in 2.50.3-1.el9_7and 3 other packages
webkit2gtk3AlmaLinux:8all versions · fixed in 2.50.3-1.el8_10and 3 other packages

Full record on NVD

Fix

Update Apple ipados to 16.6 · 15.8.7
CISA’s required action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.due 2026-03-26

Advisories and patches

support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory
support.apple.comRelease Notes · Vendor Advisory

Detection

Nuclei template: none so far
Exploit-DB: no entry
Proof-of-concept repositories: none listed

CISA Known Exploited Vulnerability

Date Added: 2026-03-05
Patch Due Date: 2026-03-26
Ransomware Use: Unknown
Required Action: Apply mitigations per vendor instructions, follow applicable BOD 22-01 guidance for cloud services, or discontinue use of the product if mitigations are unavailable.

Sources

CISA KEVKEV entry2026-03-05
GCVEexploitation2026-03-05
CISA-ADPSSVC decisionactive2026-03-06
OpenCVESSVC decisionactive—
CISA-ADPCVSS 3.18.82025-11-05
NVDCVSS 3.18.8read 2026-10-23
CISA-ADPweakness (CWE)CWE-4162025-11-05
NVDweakness (CWE)CWE-416read 2026-10-23
FIRST EPSSEPSS score4.0 %2026-10-23
OSVaffected packages—

Technical details

CVSS v3 Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
Published: 2025-11-05
Last Modified: 2026-09-21
NVD status: Analyzed

Frequently asked questions

What is CVE-2023-43000?

Is CVE-2023-43000 actively exploited?

Yes. CVE-2023-43000 is on the CISA Known Exploited Vulnerabilities (KEV) catalog, meaning it has been confirmed as actively exploited in the wild. CISA requires federal agencies to patch by 2026-03-26.

What is the CVSS score for CVE-2023-43000?

CVE-2023-43000 has a CVSS v3 base score of 8.8 (HIGH severity), with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

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