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CVE-2020-8252The implementation of realpath in libuv < 10.22.1, < 12.18.4, and < 14.9.0 used within Node.js incorrectly determined the buffer size…

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 longer than 256 bytes.

Timeline

  1. ID reserved

    By hackerone

  2. · 8 months later

    Published

  3. · 5 years later

    Record updated

Changes after publication (a new score, a public exploit, EPSS crossing 1, 10 or 50 %, leaving KEV) are kept since November 2026; earlier ones are not known.

Scores

CVSS scores of CVE-2020-8252, by who scored it
Scored byCVSSScoreVector
NVDNVD · Modified3.1High7.8CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
EPSS (exploitation in 30 days)
0.71% · top 46% of all CVEs (12 Nov 2026)
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The list uses the assigner's score when there is one, then CISA's, then NVD's: High 7.8.

Affected products

  • NodeJS · Node

    • affected 4.0 – < 4.*
    • affected 5.0 – < 5.*
    • affected 6.0 – < 6.*
    • affected 7.0 – < 7.*
    • affected 8.0 – < 8.*
    • affected 9.0 – < 9.*
    • affected 10.0 – < 10.22.1
    • affected 11.0 – < 11.*
    • affected 12.0 – < 12.18.4
    • affected 13.0 – < 13.*
    • affected 14.0 – < 14.9.0

References

References8

Sources

The same CVE in the primary databases and aggregators, to check against.

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Record last updated .