MEDIUM
undefsafe before 2.0.3 is vulnerable to Prototype Pollution
Published Feb 18, 2020
6.3
MEDIUMCVSS 3.1
EPSS 1.09%
Description
undefsafe before 2.0.3 is vulnerable to Prototype Pollution. The 'a' function could be tricked into adding or modifying properties of Object.prototype using a __proto__ payload.
Affected products
-
- Version All versions prior to version 2.0.3StatusaffectedConstraints-
- Version
- < 2.0.3
No data.
No Red Hat product state for this CVE.
undefsafe
npm
Introduced 0 Fixed 2.0.3
| Ecosystem | Package | Introduced | Fixed |
|---|---|---|---|
| npm | undefsafe | 0 | 2.0.3 |
Remediation
No remediation recorded yet.
Metrics
No CVSS v4.0 score for this CVE.
6.3 MEDIUM NVD
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L
Attack Vector Network
Attack Complexity Low
Privileges Required Low
User Interaction None
Scope Unchanged
Confidentiality Impact Low
Integrity Impact Low
Availability Impact Low
No CVSS v3.0 score for this CVE.
6.5 MEDIUM NVD
AV:N/AC:L/Au:S/C:P/I:P/A:P
Access Vector Network
Access Complexity Low
Authentication Single
Confidentiality Impact Partial
Integrity Impact Partial
Availability Impact Partial
This CVE is not in the KEV list.
No CISA SSVC assessment for this CVE yet.
1.09% 0.01089
Estimated probability of exploitation in the wild in the next 30 days (FIRST EPSS). As of Oct 3, 2026.
EPSS probability 0.01089
Score over time
2021–2026- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Percentile over time
- EPSS v1
- EPSS v5
- EPSS v2
- EPSS v3
Table of values (12 key points)
Flat stretches are collapsed; showing up to 120 newest points.
| Date | Score | Percentile | Model |
|---|---|---|---|
| Oct 3, 2026 | 1.09% (0.01089) | 64.17th | v5 (v2026.06.15) |
| Sep 20, 2026 | 1.09% (0.01089) | 63.86th | v5 (v2026.06.15) |
| Jul 20, 2024 | 0.07% (0.00074) | 32.34th | v3 (v2023.03.01) |
| Jun 21, 2024 | 0.07% (0.00074) | 32.02th | v3 (v2023.03.01) |
| Mar 7, 2023 | 0.07% (0.00074) | 29.99th | v3 (v2023.03.01) |
| Mar 6, 2023 | 0.89% (0.00885) | 27.89th | v2 (v2022.01.01) |
| Apr 1, 2022 | 0.89% (0.00885) | 24.24th | v2 (v2022.01.01) |
| Feb 4, 2022 | 4.50% (0.04499) | 74.08th | v2 (v2022.01.01) |
| Feb 3, 2022 | 2.74% (0.02742) | 63.06th | v1 |
| Jan 6, 2022 | 2.74% (0.02742) | 62.72th | v1 |
| Jan 5, 2022 | 0.62% (0.00624) | 46.35th | v5 (v2026.06.15) |
| Apr 14, 2021 | 0.62% (0.00624) | 0.00th | v1 |
Weaknesses (1)
References (4)
- https://github.com/advisories/GHSA-332q-7ff2-57h2 Advisory
- https://github.com/remy/undefsafe/commit/f272681b3a50e2c4cbb6a8533795e1453382c822 x_refsource_MISCPatchThird Party Advisory
- https://nvd.nist.gov/vuln/detail/CVE-2019-10795
- https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940 x_refsource_MISCExploitThird Party Advisory
| Link | Providers | Tags |
|---|---|---|
| https://github.com/advisories/GHSA-332q-7ff2-57h2 | Advisory | |
| https://github.com/remy/undefsafe/commit/f272681b3a50e2c4cbb6a8533795e1453382c822 | x_refsource_MISCPatchThird Party Advisory | |
| https://nvd.nist.gov/vuln/detail/CVE-2019-10795 | ||
| https://snyk.io/vuln/SNYK-JS-UNDEFSAFE-548940 | x_refsource_MISCExploitThird Party Advisory |
Change history (0)
No recorded changes yet.
Sources
CVE.org / MITRE
Status PUBLISHED
Assigner snyk
Published Feb 18, 2020
Updated Aug 4, 2024
Reserved Apr 3, 2019
Link CVE-2019-10795
CISA Vulnrichment
GHSA-332Q-7FF2-57H2 Updated n/a