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.
Metrics
Affected Vendors & Products
| Vendors | Products |
|---|---|
| Ohler |
|
| Ohler55 |
|
No data.
No data.
References
History
Wed, 01 Jul 2026 10:30:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| First Time appeared |
Ohler
Ohler oj Ohler55 Ohler55 oj |
|
| Vendors & Products |
Ohler
Ohler oj Ohler55 Ohler55 oj |
Wed, 01 Jul 2026 00:15:00 +0000
| Type | Values Removed | Values Added |
|---|---|---|
| Description | 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. | |
| Title | Oj: Integer Overflow in Oj.load 2GB String Handling | |
| Weaknesses | CWE-190 | |
| References |
| |
| Metrics |
cvssV4_0
|
MITRE
Status: PUBLISHED
Assigner: GitHub_M
Published: 2026-06-30T23:42:06.777Z
Updated: 2026-06-30T23:42:06.777Z
Reserved: 2026-06-16T13:49:33.555Z
Link: CVE-2026-54903
Vulnrichment
No data.
NVD
No data.
Redhat
No data.