CVE-2020-8252
The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is
02 Description
The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size which can result in a buffer overflow if the resolved path is
03 Exploitation and scoring
- Exploitation
- Not assessed. CISA has not published an exploitation assessment for this record, and it is not in the KEV catalog. That is an absence of assessment, not a finding of no risk.
- SSVC decision
- Not assessed by CISA
- EPSS probability
- 0.71% probability of exploitation activity in the next 30 days.
- EPSS percentile
- Equal to or higher than the score of 53.2% of scored records. A rank, not a probability.
- NVD base score
- 7.8 (CVSS v3.x), scored by the NVD independently of the CNA.
- NVD CVSS vector
- CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
- NVD analysis status
- Modified. NVD last modified this record on 2026-06-17.
- Red Hat severity
- Important. Red Hat's rating for its own products, not a CVSS rating.
Exploit-prediction scores from FIRST. Independent scoring and analysis status from the NVD. Vendor severity from Red Hat. Exploitation assessment and catalog membership from CISA.
04 Metadata
- Published
- 2020-09-18 20:11Z6 YR AGO
- Last updated
- 2025-04-30 22:24Z1 YR AGO
- Reserved
- 2020-01-28
- Assigning CNA
- hackerone
- Record state
- PUBLISHED
- Severity
- Not rated by the issuing CNA
- CNA CVSS vector
- Not published by the issuing CNA
- Weaknesses
- Data version
- 5.1
- Document digest
- 5a1e9325921856439f05e2fde78ccd88103ae5bafe9fd6902b814604e459ae87
05 Affected products
06 References
- nodejs.orghttps://nodejs.org/en/blog/vulnerability/september-2020-security-releases/
- hackerone.comhttps://hackerone.com/reports/965914
- security.gentoo.orgGLSA-202009-15https://security.gentoo.org/glsa/202009-15
- usn.ubuntu.comUSN-4548-1https://usn.ubuntu.com/4548-1/
- lists.opensuse.orgopenSUSE-SU-2020:1616http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00011.html
- security.netapp.comhttps://security.netapp.com/advisory/ntap-20201009-0004/
- lists.opensuse.orgopenSUSE-SU-2020:1660http://lists.opensuse.org/opensuse-security-announce/2020-10/msg00023.html
- lists.fedoraproject.orgFEDORA-2020-43d5a372fchttps://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/4OOYAMJVLLCLXDTHW3V5UXNULZBBK4O6/
07 Fixed in
AlmaLinux 8
- nodejs-nodemon Fixed
A version is affected if any line below covers it.
- Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
- Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
- nodejs-packaging Fixed
A version is affected if any line below covers it.
- Affected before 17-3.module_el8.3.0+2023+d2377ea3
- Affected before 17-3.module_el8.4.0+2224+b07ac28e
- Affected before 17-3.module_el8.4.0+2521+c668cc9f
Source: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
CloudLinux 8
- nodejs-nodemon Fixed
A version is affected if any line below covers it.
- Affected before 1.18.3-1.module_el8.3.0+2023+d2377ea3
- Affected before 1.18.3-1.module_el8.3.0+2047+b07ac28e
- nodejs-packaging Fixed
A version is affected if any line below covers it.
- Affected before 17-3.module_el8.3.0+2023+d2377ea3
- Affected before 17-3.module_el8.4.0+2224+b07ac28e
- Affected before 17-3.module_el8.4.0+2521+c668cc9f
Derived from AlmaLinux 8. Partial coverage: only packages taken from AlmaLinux 8 are listed.
Source: CloudLinux errata, CloudLinux Inc. Derived from: AlmaLinux, AlmaLinux OS. Copyright (c) 2023 AlmaLinux OS. Licensed under MIT License. Received through OSV.dev. Reformatted by exploit.cc.
Debian 12
- libuv1 Fixed in 1.39.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 13
- libuv1 Fixed in 1.39.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Debian 14
- libuv1 Fixed in 1.39.0-1
Source: Debian Security Tracker, the Debian security team. Received through OSV.dev. Reformatted by exploit.cc.
Ubuntu 20.04 LTS
- libuv1 Fixed in 1.34.2-1ubuntu1.1
Source: Ubuntu, Canonical Ltd. Licensed under CC BY-SA 4.0. Received through OSV.dev. Reformatted by exploit.cc.
A release or ecosystem missing from this list has no record here. It may be unaffected or not covered by the source. Source notices and licences.