CVE-2025-43434

A use-after-free issue was addressed with improved memory management. This issue is fixed in Safari 26.1, iOS 18.7.2 and iPadOS 18.7.2, iOS 26.1 and iPadOS 26.1, macOS Tahoe 26.1, visionOS 26.1, watchOS 26.1. Processing maliciously crafted web content may lead to an unexpected Safari crash.

Published: 2025-11-04 Last update: 2026-04-02 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2025-43434 is rated Low Risk (39.7/100): CVSS Medium severity, with medium exploitation likelihood (EPSS 1.10%). EPSS rose +1.05% over the last day, indicating growing attacker interest. Monitor for updates and reassess as exploit intelligence or EPSS changes.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Exploit prediction scoring system (EPSS) score for CVE-2025-43434

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 0.06% 1.10% +1.05%
2 2026-05-31 0.05% 0.06% +0.01%
3 2026-04-23 — 0.05% —

Full EPSS history (7 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2025-43434

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
4.3 3.1 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L Click to expand
Attack vector (AV:N)
Could be attacked over the internet or any normal routed network—not just someone sitting at the machine.
Attack complexity (AC:L)
Once they can reach the bug, pulling it off is straightforward—no weird race conditions or rare setup.
Privileges required (PR:N)
No account or special rights needed—anonymous or random user is enough.
User interaction (UI:R)
A real person has to do something—click, install, enable—otherwise it doesn’t land.
Scope (S:U)
Damage stays in the same “trust bubble” as the broken component—no big spill into unrelated systems.
Confidentiality (C:N)
Doesn’t really leak secrets in a meaningful way.
Integrity (I:N)
Data isn’t meaningfully altered or forged.
Availability (A:L)
Might cause slowdowns, glitches, or partial disruption—not a full brick.
 2.8 1.4 134c704f-9b21-4f2e-91b3-4a467353bcc0

Weakness enumeration for CVE-2025-43434

OS Trackers for CVE-2025-43434

vendor priority summary link
debian end-of-life CVE-2025-43434 end-of-life priority: Debian including 2 source packages (webkit2gtk, wpewebkit), 10 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): resolved 7, open 3. https://security-tracker.debian.org/tracker/CVE-2025-43434
redhat high — https://access.redhat.com/security/cve/CVE-2025-43434
suse medium CVE-2025-43434 severity moderate: SUSE including 116 source package names (2.2.0-4.55:gpg2-2.4.4-slfo.1.1_2.1, 2.2.1-7.2:gpg2-2.4.4-slfo.1.1_2.1, …), 503 product×package rows across 73 product lines (Container suse/sl-micro/6.0/baremetal-os-container, Container suse/sl-micro/6.0/base-os-container, … (73 product lines)): Fixed 481, First Fixed 18, Known Not Affected 4. https://www.suse.com/security/cve/CVE-2025-43434/
ubuntu medium CVE-2025-43434 medium priority: Ubuntu including 5 source packages (qtwebkit-opensource-src, qtwebkit-source, webkit2gtk, webkitgtk, wpewebkit), 36 status rows across 8 suites (bionic, focal, jammy, noble, plucky, questing, upstream, xenial): ignored 14, DNE 13, released 5, needs-triage 4. https://ubuntu.com/security/CVE-2025-43434

Affected software / configurations for CVE-2025-43434

Vendor Product Version Raw CPE
apple safari < 26.1 cpe:2.3:a:apple:safari:*:*:*:*:*:*:*:*
apple ipados < 26.1 cpe:2.3:o:apple:ipados:*:*:*:*:*:*:*:*
apple iphone_os < 26.1 cpe:2.3:o:apple:iphone_os:*:*:*:*:*:*:*:*
apple visionos < 26.1 cpe:2.3:o:apple:visionos:*:*:*:*:*:*:*:*
apple watchos < 26.1 cpe:2.3:o:apple:watchos:*:*:*:*:*:*:*:*

References for CVE-2025-43434

cvelogic Threat Intelligence