Ruby JSON has a format string injection vulnerability
21Vexday Risk Score
No sign of exploitation. No public exploitation artifact known so far.
ssvc Trackcvss 8.3epss 0.8%
exploitation probability
0.8%top 46% of all CVEs
observed exploitation
nono source reports it
Ruby JSON is a JSON implementation for Ruby. From version 2.14.0 to before versions 2.15.2.1, 2.17.1.2, and 2.19.2, a format string injection vulnerability can lead to denial of service attacks or information disclosure, when the allow_duplicate_key: false parsing option is used to parse user supplied documents. This issue has been patched in versions 2.15.2.1, 2.17.1.2, and 2.19.2.
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:L/VI:N/VA:H/SC:N/SI:N/SA:N
Affected products
ruby · jsonReferences
https://access.redhat.com/errata/RHSA-2026:20596https://access.redhat.com/errata/RHSA-2026:20606https://access.redhat.com/security/cve/CVE-2026-33210https://bugzilla.redhat.com/show_bug.cgi?id=2449871https://github.com/ruby/json/security/advisories/GHSA-3m6g-2423-7cp3https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33210.json