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Vulnerability ID

CVE-2026-109716

AI Exploitable

Out-of-bounds access in SpiderMonkey

ProductFirefox

CVSS 3.1High8.1

EPSS0.31%

Has public PoCNo

AI Exploitability

A working PoC was successfully generated by AI

Working AI PoC: Yes
Cheapest run: $16.36
Fastest run: 1.2 hr

Model Matrix Capability Breakdown Vulnerability Details Timeline Community

Model Matrix Capability Breakdown Vulnerability Details Timeline Community

Overview

Incorrect boundary conditions in the JavaScript Engine component. This vulnerability was fixed in Firefox 158, Firefox ESR 115.43, Firefox ESR 153.5, Thunderbird 158, and Thunderbird 153.5.

CWE: CWE-119
Weakness: Improper Restriction of Operations within the Bounds of a Memory Buffer
Component: SpiderMonkey
Impact: Not stated
Published: 2026-10-13
Fixed version: 158

Risk factors

In-the-WildNot observed

CISA KEVNot listed

Public ExploitNone known

Ransomware useNone known

Severity

CVSS 3.1Only version published

8.1High

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

Exploitability

Attack VectorNetwork

ComplexityLow

Privileges RequiredNone

User InteractionRequired

Impact

ConfidentialityHigh

IntegrityHigh

AvailabilityNone

EPSS

Chance of exploitation in the next 30 days

0.31%

SSVC

Stakeholder-specific vulnerability categorization

Not scored. CISA publishes an SSVC decision for a subset of CVEs.