Medium (5.9). EPSS 7.8% chance of exploitation in the next 30 days. Fixed in simplejson 2.6.1.
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.
Severity
CVSS 3.1
5.9 medium
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N
EPSS
7.8% chance of exploitation in the next 30 days; higher than 94% of CVEs (scores of 2026-10-31)