MEDIUM
A security feature bypass vulnerability exists in the Microsoft Chakra scripting engine that allows Control Flow Guard (CFG) to be bypassed, aka "Scripting Engine Security Feature Bypass Vulnerability." This affects Microsoft Edge, ChakraCore
Published Jul 11, 2018
6.5
MEDIUMCVSS 3.0
EPSS 5.61%
Description
A security feature bypass vulnerability exists in the Microsoft Chakra scripting engine that allows Control Flow Guard (CFG) to be bypassed, aka "Scripting Engine Security Feature Bypass Vulnerability." This affects Microsoft Edge, ChakraCore.
Affected products
-
- Version ChakraCoreStatusaffectedConstraints-
- Version
-
- Version Windows 10 Version 1703 for 32-bit SystemsStatusaffectedConstraints-
- Version Windows 10 Version 1703 for x64-based SystemsStatusaffectedConstraints-
- Version Windows 10 Version 1709 for 32-bit SystemsStatusaffectedConstraints-
- Version Windows 10 Version 1709 for x64-based SystemsStatusaffectedConstraints-
- Version Windows 10 Version 1803 for 32-bit SystemsStatusaffectedConstraints-
- Version Windows 10 Version 1803 for x64-based SystemsStatusaffectedConstraints-
- Version
Default status is the baseline for the product, each version can override it (e.g. patched versions marked unaffected).
| Vendor | Product | Default status | Versions | |||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Microsoft | ChakraCore | n/a |
| |||||||||||||||||||||
| Microsoft | Microsoft Edge | n/a |
|
AND
Running on/with
OR
- 1709
- 1803
No data.
No Red Hat product state for this CVE.
No package ranges for this CVE.
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
6.5 MEDIUM NVD
CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:N
Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality Impact None
Integrity Impact High
Availability Impact None
4.3 MEDIUM NVD
AV:N/AC:M/Au:N/C:N/I:P/A:N
Access Vector Network
Access Complexity Medium
Authentication None
Confidentiality Impact None
Integrity Impact Partial
Availability Impact None
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
5.61% 0.05609
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
EPSS probability 0.05609
Score over time
2021–2026- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Percentile over time
- EPSS v1
- EPSS v2
- EPSS v3
- EPSS v4
- EPSS v5
Table of values (32 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 5.61% (0.05609) | 92.67th | v5 (v2026.06.15) |
| Jun 15, 2026 | 5.26% (0.05257) | 91.45th | v5 (v2026.06.15) |
| Jun 13, 2026 | 13.55% (0.13553) | 94.42th | v4 (v2025.03.14) |
| Apr 18, 2026 | 15.83% (0.15827) | 94.75th | v4 (v2025.03.14) |
| Apr 2, 2026 | 19.82% (0.19822) | 95.42th | v4 (v2025.03.14) |
| Jan 25, 2026 | 15.71% (0.15709) | 94.52th | v4 (v2025.03.14) |
| Dec 27, 2025 | 19.95% (0.19948) | 95.30th | v4 (v2025.03.14) |
| Nov 29, 2025 | 16.09% (0.16094) | 94.53th | v4 (v2025.03.14) |
| Nov 21, 2025 | 13.84% (0.13837) | 94.02th | v4 (v2025.03.14) |
| Nov 18, 2025 | 11.45% (0.11447) | 92.88th | v4 (v2025.03.14) |
| Nov 2, 2025 | 13.84% (0.13837) | 94.04th | v4 (v2025.03.14) |
| Jul 5, 2025 | 10.68% (0.10679) | 92.96th | v4 (v2025.03.14) |
| Mar 30, 2025 | 8.25% (0.08255) | 91.42th | v4 (v2025.03.14) |
| Mar 29, 2025 | 20.97% (0.20975) | 92.88th | v4 (v2025.03.14) |
| Mar 17, 2025 | 8.25% (0.08255) | 91.61th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.23% (0.00226) | 61.78th | v3 (v2023.03.01) |
| Dec 1, 2023 | 0.23% (0.00226) | 60.64th | v3 (v2023.03.01) |
| Jul 8, 2023 | 0.29% (0.00295) | 65.00th | v3 (v2023.03.01) |
| Jul 4, 2023 | 0.51% (0.00514) | 73.44th | v3 (v2023.03.01) |
| May 16, 2023 | 0.53% (0.00528) | 73.64th | v3 (v2023.03.01) |
| May 8, 2023 | 0.75% (0.00748) | 78.21th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.43% (0.00429) | 70.45th | v3 (v2023.03.01) |
| Mar 6, 2023 | 6.42% (0.06416) | 91.03th | v2 (v2022.01.01) |
| Oct 31, 2022 | 6.42% (0.06416) | 90.76th | v2 (v2022.01.01) |
| May 23, 2022 | 5.85% (0.05853) | 89.68th | v2 (v2022.01.01) |
| Apr 16, 2022 | 5.27% (0.05274) | 88.85th | v2 (v2022.01.01) |
| Apr 1, 2022 | 4.79% (0.04794) | 88.19th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.79% (0.04794) | 74.58th | v2 (v2022.01.01) |
| Feb 3, 2022 | 8.76% (0.08756) | 86.41th | v1 |
| Jan 6, 2022 | 8.76% (0.08756) | 86.25th | v1 |
| Sep 1, 2021 | 8.76% (0.08756) | 93.70th | v1 |
| Apr 14, 2021 | 8.76% (0.08756) | 0.00th | v1 |
Weaknesses (0)
No CWE recorded.
References (8)
- http://www.securityfocus.com/bid/104626 vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry
- http://www.securitytracker.com/id/1041256 vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry
- https://github.com/advisories/GHSA-wg47-6cqc-q52j Advisory
- https://github.com/chakra-core/ChakraCore/commit/4196f8097afdcc5fe01ce2966871712fb24003a3
- https://nvd.nist.gov/vuln/detail/CVE-2018-8276
- https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8276 x_refsource_CONFIRMPatchVendor Advisory
- https://web.archive.org/web/20210124183457/http://www.securityfocus.com/bid/104626
- https://web.archive.org/web/20211202002348/http://www.securitytracker.com/id/1041256
| Link | Providers | Tags |
|---|---|---|
| http://www.securityfocus.com/bid/104626 | vdb-entryx_refsource_BIDThird Party AdvisoryVDB Entry | |
| http://www.securitytracker.com/id/1041256 | vdb-entryx_refsource_SECTRACKThird Party AdvisoryVDB Entry | |
| https://github.com/advisories/GHSA-wg47-6cqc-q52j | Advisory | |
| https://github.com/chakra-core/ChakraCore/commit/4196f8097afdcc5fe01ce2966871712fb24003a3 | ||
| https://nvd.nist.gov/vuln/detail/CVE-2018-8276 | ||
| https://portal.msrc.microsoft.com/en-US/security-guidance/advisory/CVE-2018-8276 | x_refsource_CONFIRMPatchVendor Advisory | |
| https://web.archive.org/web/20210124183457/http://www.securityfocus.com/bid/104626 | ||
| https://web.archive.org/web/20211202002348/http://www.securitytracker.com/id/1041256 |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner microsoft
Published Jul 11, 2018
Updated Aug 5, 2024
Reserved Mar 14, 2018
Link CVE-2018-8276
CISA Vulnrichment
GHSA-WG47-6CQC-Q52J Updated n/a