CVE catalog
CVE-2026-33210
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 inf
- Severity
- Critical · CVSS 9.1
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.87% · Oct 25, 2026
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.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | ruby-json | sid | 3.1.0+dfsg-1 | fixed |
| Debian | ruby-json | forky | 3.1.0+dfsg-1 | fixed |
| Debian | ruby-json | trixie | 2.9.1+dfsg-1 | not affected |
| Debian | ruby-json | bookworm | 2.6.3+dfsg-1 | not affected |
| Rubygems | json | Not reported | 2.19.2 | fixed |
| Rubygems | json | Not reported | 2.17.1.2 | fixed |
| Rubygems | json | Not reported | 2.15.2.1 | fixed |
| Cpe | ruby-json | Not reported | Not reported | not affected |
| Cpe | json | Not reported | 2.19.2 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ruby-json | source | sid | 2.19.2+dfsg-1 | not yet assigned | Not reported | [1131463] |
| Debian | ruby-json | source | forky | 2.19.2+dfsg-1 | not yet assigned | Not reported | [1131463] |
| Debian | ruby-json | source | trixie | Not affected | unimportant | Not reported | [1131463] |
| Debian | ruby-json | source | bookworm | Not affected | unimportant | Not reported | [1131463] |
| Rubygems | json | rubygems | Not reported | 2.19.2 | Not reported | Not reported | Not reported |
| Rubygems | json | rubygems | Not reported | 2.17.1.2 | Not reported | Not reported | Not reported |
| Rubygems | json | rubygems | Not reported | 2.15.2.1 | Not reported | Not reported | Not reported |
| Cpe | json | cpe | Not reported | 2.19.2 | Not reported | NVD-CVE-2026-33210 | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ruby-json]Not affected
Details (2)
2.6.3+dfsg-1· amd64 · bookwormNot affected
nvd · ruby-json · debian · bookworm
2.6.3+dfsg-1· arm64 · bookwormNot affected
nvd · ruby-json · debian · bookworm
Observed:
References
- [https://ftp.suse.com/pub/projects/security/csaf/rhsa-2026_20596.json]
- [https://github.com/advisories/GHSA-3m6g-2423-7cp3]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-33210]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-33210]
- [https://security-tracker.debian.org/tracker/CVE-2026-33210]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-33210.json]
[Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX] · [SUSE security advisories and VEX]