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Vulnerability record · CVE-2020-10663 · published 28 April 2020

CVE-2020-10663: Json project json improper input validation vulnerability

Json Project · Json

The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar to CVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application-dependent.

7.5 CVSS 3.1 High EPSS 6.8% · top 6.2% CWE-20 · Improper input validation
7.5CVSS 3.1 base score, v2 5.0
6.8%EPSS exploitation probability, 30 days
NoNot in CISA KEV
5Affected product versions listed by NVD
38References
17 Jun 2026Last modified by NVD

Description

The JSON gem through 2.2.0 for Ruby, as used in Ruby 2.4 through 2.4.9, 2.5 through 2.5.7, and 2.6 through 2.6.5, has an Unsafe Object Creation Vulnerability. This is quite similar to CVE-2013-0269, but does not rely on poor garbage-collection behavior within Ruby. Specifically, use of JSON parsing methods can lead to creation of a malicious object within the interpreter, with adverse effects that are application-dependent.

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Affected products

5 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00004.html Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing ListThird Party Advisory
https://lists.apache.org/thread.html/r37c0e1807da7ff2bdd028bbe296465a6bbb99e2320dbe661d5d8b33b%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r3b04f4e99a19613f88ae088aa18cd271231a3c79dfff8f5efa8cda61%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r5f17bfca1d6e7f4b33ae978725b2fd62a9f1b3111696eafa9add802d%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r8d2e174230f6d26e16c007546e804c343f1f68956f526daaafa4aaae%40%3Cdev.zookeeper.apache
https://lists.apache.org/thread.html/rb023d54a46da1ac0d8969097f5fecc79636b07d3b80db7b818a5c55c%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rb2b981912446a74e14fe6076c4b7c7d8502727ea0718e6a65a9b1be5%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rd9b9cc843f5cf5b532bdad9e87a817967efcf52b917e8c43b6df4cc7%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rec8bb4d637b04575da41cfae49118e108e95d43bfac39b7b698ee4db%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/ree3abcd33c06ee95ab59faa1751198a1186d8941ddc2c2562c12966c%40%3Cissues.zookeeper.apa
https://lists.debian.org/debian-lts-announce/2020/04/msg00030.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7QL6MJD2BO4IRJ5CJFNMCDY
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSV
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NK2PBXWMFRUD7U7Q7LHV4KY
https://security.netapp.com/advisory/ntap-20210129-0003/ Third Party Advisory
https://support.apple.com/kb/HT211931 Third Party Advisory
https://www.debian.org/security/2020/dsa-4721 Third Party Advisory
https://www.ruby-lang.org/en/news/2020/03/19/json-dos-cve-2020-10663/ Vendor Advisory
http://lists.opensuse.org/opensuse-security-announce/2020-05/msg00004.html Mailing ListThird Party Advisory
http://seclists.org/fulldisclosure/2020/Dec/32 Mailing ListThird Party Advisory
https://lists.apache.org/thread.html/r37c0e1807da7ff2bdd028bbe296465a6bbb99e2320dbe661d5d8b33b%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r3b04f4e99a19613f88ae088aa18cd271231a3c79dfff8f5efa8cda61%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r5f17bfca1d6e7f4b33ae978725b2fd62a9f1b3111696eafa9add802d%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/r8d2e174230f6d26e16c007546e804c343f1f68956f526daaafa4aaae%40%3Cdev.zookeeper.apache
https://lists.apache.org/thread.html/rb023d54a46da1ac0d8969097f5fecc79636b07d3b80db7b818a5c55c%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rb2b981912446a74e14fe6076c4b7c7d8502727ea0718e6a65a9b1be5%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rd9b9cc843f5cf5b532bdad9e87a817967efcf52b917e8c43b6df4cc7%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/rec8bb4d637b04575da41cfae49118e108e95d43bfac39b7b698ee4db%40%3Cissues.zookeeper.apa
https://lists.apache.org/thread.html/ree3abcd33c06ee95ab59faa1751198a1186d8941ddc2c2562c12966c%40%3Cissues.zookeeper.apa
https://lists.debian.org/debian-lts-announce/2020/04/msg00030.html Mailing ListThird Party Advisory
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/7QL6MJD2BO4IRJ5CJFNMCDY
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/F4TNVTT66VPRMX5UZYSDGSV
https://lists.fedoraproject.org/archives/list/package-announce%40lists.fedoraproject.org/message/NK2PBXWMFRUD7U7Q7LHV4KY
https://security.netapp.com/advisory/ntap-20210129-0003/ Third Party Advisory
https://support.apple.com/kb/HT211931 Third Party Advisory
https://www.debian.org/security/2020/dsa-4721 Third Party Advisory
https://www.ruby-lang.org/en/news/2020/03/19/json-dos-cve-2020-10663/ Vendor Advisory

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Source: NIST National Vulnerability Database (record CVE-2020-10663), CISA KEV, FIRST EPSS (scores of 2026-09-27). This page is refreshed as NVD updates the record.