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Fencer Intel
high 7.5

CVE-2018-8466 in the critical feed json

ChakraCore RCE Vulnerability

published 8y ago modified 4mo ago also GHSA-4c93-q79v-mw45 , EUVD-2022-2356

cvss
7.5
version 3.0, NVD
cisa kev
Not listed
not in CISA's catalog
epss
69.0%
EPSS 69.0% chance of exploitation in 30 days, percentile 99.3%
public exploits
1
Exploit-DB

Summary

A remote code execution vulnerability exists in the way that the Chakra scripting engine handles objects in memory in Microsoft Edge, aka "Chakra Scripting Engine Memory Corruption Vulnerability." This affects Microsoft Edge, ChakraCore. This CVE ID is unique from CVE-2018-8367, CVE-2018-8465, CVE-2018-8467.

Patch / fix

  • nuget Microsoft.ChakraCore 1.11.1

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Timeline

  1. Published
  2. First public exploit (EDB-45571)

Exploit prediction

69.02% chance of exploitation in the next 30 days, higher than 99.3% of all scored CVEs (FIRST EPSS, 2026-11-09).

Exploits and checks

  • EDB-45571 Microsoft Edge Chakra JIT - 'BailOutOnInvalidatedArrayHeadSegment' Check Bypass dos, 2018-10-09

CVSS scores

assigned by version score vector
NVD 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
NVD 2.0 7.6 AV:N/AC:H/Au:N/C:C/I:C/A:C
GitHub 3.0 7.5 CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H

Affected packages

ecosystem package affected fixed in
nuget Microsoft.ChakraCore
<1.11.1
1.11.1

Affected products

  • Microsoft Microsoft Edge
  • Microsoft ChakraCore

Classification

Weakness

References

Sources

Fencer Intel keeps one entry per vulnerability: the CVE id wins, then GHSA, and records that alias each other are merged, except that two CVEs always keep separate entries. The same data is available as JSON.