CVE catalog
CVE-2026-54903
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An
- Severity
- High · CVSS 7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.33% · Oct 25, 2026
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2, Oj.load is vulnerable to heap corruption when parsing a JSON string longer than 2 GB. An integer overflow in buf_append_string (buf.h:61) converts the string length to a large negative size_t, causing memcpy to copy an astronomically large amount of data out of bounds. This crashes the process and can corrupt adjacent heap memory. The issue has been fixed in version 3.17.2.
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-oj | sid | 3.17.7-1 | fixed |
| Debian | ruby-oj | forky | 3.17.7-1 | fixed |
| Debian | ruby-oj | trixie | 3.16.3-1 | vulnerable |
| Debian | ruby-oj | trixie-security | 3.16.3-1+deb13u1 | fixed |
| Debian | ruby-oj | bookworm | 3.14.2-1 | vulnerable |
| Debian | ruby-oj | bookworm-security | 3.14.2-1+deb12u1 | fixed |
| Cpe | ruby-oj | Not reported | Not reported | vulnerable |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | ruby-oj | source | sid | 3.17.3-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-oj | source | forky | 3.17.3-1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-oj | source | trixie | 3.16.3-1+deb13u1 | not yet assigned | Not reported | Not reported |
| Debian | ruby-oj | source | bookworm | 3.14.2-1+deb12u1 | not yet assigned | Not reported | Not reported |
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [ruby-oj]Affected
Details (2)
3.14.2-1· amd64 · bookwormAffected · Fixed:
3.14.2-1+deb12u1nvd · ruby-oj · debian · bookworm; nvd · ruby-oj · debian · 12
3.14.2-1· arm64 · bookwormAffected · Fixed:
3.14.2-1+deb12u1nvd · ruby-oj · debian · bookworm; nvd · ruby-oj · debian · 12
[Debian 13 (Trixie)]
- [ruby-oj]Affected
Details (3)
3.16.3-1+b5· amd64 · trixieAffected · Fixed:
3.16.3-1+deb13u1nvd · ruby-oj · debian · 13
3.16.3-1+b5· arm64 · trixieAffected · Fixed:
3.16.3-1+deb13u1nvd · ruby-oj · debian · 13
3.16.3-1+deb13u1· amd64 · trixie-securityFixed · Fixed:
3.16.3-1+deb13u1nvd · ruby-oj · debian · 13
Observed:
References
- [https://github.com/ohler55/oj/security/advisories/GHSA-475m-ph3x-64gp]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-54903]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-54903]
- [https://security-tracker.debian.org/tracker/CVE-2026-54903]
- [https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-54903.json]
[Debian Security Tracker] · [FIRST EPSS] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database] · [Red Hat security advisories and VEX]