{"id":"PYSEC-2026-921","summary":"simplejson before 2.6.1 vulnerable to array index error","details":"Array index error in the scanstring function in the _json module in Python 2.7 through 3.5 and simplejson before 2.6.1 allows context-dependent attackers to read arbitrary process memory via a negative index value in the idx argument to the raw_decode function.","aliases":["CVE-2014-4616","GHSA-9772-cwx9-r4cj","PSF-2017-1"],"modified":"2026-07-07T11:56:58.638664422Z","published":"2026-07-06T08:03:23.234177Z","references":[{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2014-4616"},{"type":"WEB","url":"https://hackerone.com/reports/12297"},{"type":"WEB","url":"https://bugs.debian.org/cgi-bin/bugreport.cgi?bug=752395"},{"type":"WEB","url":"https://bugzilla.redhat.com/show_bug.cgi?id=1112285"},{"type":"PACKAGE","url":"https://github.com/simplejson/simplejson"},{"type":"WEB","url":"https://security.gentoo.org/glsa/201503-10"},{"type":"WEB","url":"http://bugs.python.org/issue21529"},{"type":"WEB","url":"http://lists.opensuse.org/opensuse-updates/2014-07/msg00015.html"},{"type":"WEB","url":"http://openwall.com/lists/oss-security/2014/06/24/7"},{"type":"WEB","url":"http://rhn.redhat.com/errata/RHSA-2015-1064.html"},{"type":"WEB","url":"http://www.securityfocus.com/bid/68119"},{"type":"PACKAGE","url":"https://pypi.org/project/simplejson"},{"type":"ADVISORY","url":"https://github.com/advisories/GHSA-9772-cwx9-r4cj"}],"affected":[{"package":{"name":"simplejson","ecosystem":"PyPI","purl":"pkg:pypi/simplejson"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.6.1"}]}],"versions":["1.1","1.3","1.4","1.5","1.6","1.7","1.7.1","1.7.2","1.7.3","1.7.4","1.7.5","1.8","1.8.1","1.9","1.9.1","1.9.2","1.9.3","2.0.0","2.0.1","2.0.2","2.0.3","2.0.4","2.0.5","2.0.6","2.0.7","2.0.8","2.0.9","2.1.0","2.1.0rc3","2.1.1","2.1.2","2.1.3","2.1.4","2.1.5","2.1.6","2.2.0","2.2.1","2.3.0","2.3.1","2.3.2","2.3.3","2.4.0","2.5.0","2.5.1","2.5.2","2.6.0"],"database_specific":{"source":"https://github.com/pypa/advisory-database/blob/main/vulns/simplejson/PYSEC-2026-921.yaml"}}],"schema_version":"1.7.5","severity":[{"type":"CVSS_V3","score":"CVSS:3.0/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"}]}