CVE-2023-42956

MEDIUMNVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2024-03-28. NVD baseline CVSS 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
6.5
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 1%CVSS: 6.5Exploit: NoneExposed: 0

A fix is available — apply it.

The issue was addressed with improved memory handling. This issue is fixed in Safari 17.2, iOS 17.2 and iPadOS 17.2, macOS Sonoma 14.2. Processing web content may lead to a denial-of-service.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity65% × 45%
Exploitation1% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS
58.5%
KEV
Not listed

Published

March 28, 2024

Last Modified

November 21, 2024

References (12)

Vendor Advisories for CVE-2023-42956(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Patch Availability(3)

Vendor / EcosystemFixed in / PatchReleasedSource
ubuntuwebkit2gtk-driver (2.44.0-0ubuntu0.23.10.1) @ mantic2026-05-24ubuntu
redhatwebkitgtk4-0:2.48.3-2.el7_92025-07-07redhat
redhatwebkit2gtk3-0:2.44.3-2.el92024-11-12redhat

Patches are aggregated from vendor advisories (Red Hat, Microsoft, Cisco, GitHub) and package ecosystems (OSV, GHSA). Multiple rows for the same upstream release have been deduplicated.

Additional Vendor Advisories

(2)

Vendors that published advisories for this CVE beyond the curated set above. Broader coverage but minimal per-row detail — click through for the original advisory.

Data Freshness Timeline

(refreshed 12× in last 7d / 48× 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.

Showing the most recent 100 of 109 total refreshes for this CVE.

  1. 2026-07-23 02:26 UTCEG score recompute
  2. 2026-07-22 23:13 UTCEG score recompute
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Frequently asked(5)

What is CVE-2023-42956?
CVE-2023-42956 is a medium vulnerability published on March 28, 2024. The issue was addressed with improved memory handling. This issue is fixed in Safari 17.2, iOS 17.2 and iPadOS 17.2, macOS Sonoma 14.2. Processing web content may lead to a denial-of-service.
When was CVE-2023-42956 disclosed?
CVE-2023-42956 was first published in the National Vulnerability Database on March 28, 2024, with the most recent update on November 21, 2024. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2023-42956 actively exploited?
CVE-2023-42956 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 58.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2023-42956?
CVE-2023-42956 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2023-42956?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2023-42956, 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.

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