merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects
Published Jun 7, 2018
8.8
HIGHCVSS 3.0
EPSS 2.04%
Description
merge-deep node module before 3.0.1 suffers from a Modification of Assumed-Immutable Data (MAID) vulnerability, which allows a malicious user to modify the prototype of "Object" via __proto__, causing the addition or modification of an existing property that will exist on all objects.
Affected products
-
- Version Versions before 3.0.1StatusaffectedConstraints-
- 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 | ||||||
|---|---|---|---|---|---|---|---|---|---|
| HackerOne | Merge-Deep Node Module | n/a |
|
- < 3.0.1
No data.
No Red Hat product state for this CVE.
merge-deep
npm
Introduced 0 Fixed 3.0.1
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | merge-deep | 0 | 3.0.1 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
No CVSS v3.1 score for this CVE.
CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
AV:N/AC:L/Au:S/C:P/I:P/A:P
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 1, 2026.
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
- EPSS v4
Table of values (10 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 1, 2026 | 2.04% (0.02036) | 80.38th | v5 (v2026.06.15) |
| Jun 15, 2026 | 2.04% (0.02036) | 78.50th | v5 (v2026.06.15) |
| Mar 17, 2025 | 0.45% (0.00453) | 61.69th | v4 (v2025.03.14) |
| Dec 12, 2024 | 0.11% (0.00106) | 44.95th | v3 (v2023.03.01) |
| Oct 28, 2023 | 0.11% (0.00106) | 42.93th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.10% (0.00097) | 38.88th | v3 (v2023.03.01) |
| Mar 6, 2023 | 9.03% (0.09029) | 94.14th | v2 (v2022.01.01) |
| Feb 4, 2022 | 9.03% (0.09029) | 86.86th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v5 (v2026.06.15) |
| Apr 14, 2021 | 2.74% (0.02742) | 0.00th | v1 |
References (5)
- https://github.com/advisories/GHSA-9g9w-hmvj-5h57 Advisory
- https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5 x_refsource_MISCPatchThird Party Advisory
- https://hackerone.com/reports/310708 x_refsource_MISCExploitThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2018-3722
- https://www.npmjs.com/advisories/580
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-9g9w-hmvj-5h57 | Advisory | |
| https://github.com/jonschlinkert/merge-deep/commit/2c33634da7129a5aefcc262d2fec2e72224404e5 | x_refsource_MISCPatchThird Party Advisory | |
| https://hackerone.com/reports/310708 | x_refsource_MISCExploitThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2018-3722 | ||
| https://www.npmjs.com/advisories/580 |
Change history (0)
No recorded changes yet.