ohler55 oj up to 3.17.1 Oj.load integer overflow

CVSS Meta Temp Score
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CTI Interest Score
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4.1$0-$5k0.00

Summaryinfo

A vulnerability, which was classified as problematic, was found in ohler55 oj up to 3.17.1. This issue affects the function Oj.load. Executing a manipulation can lead to integer overflow. This vulnerability is registered as CVE-2026-54903. The attack requires access to the local network. No exploit is available. You should upgrade the affected component.

Detailsinfo

A vulnerability classified as problematic was found in ohler55 oj up to 3.17.1. This vulnerability affects the function Oj.load. The manipulation with an unknown input leads to a integer overflow vulnerability. The CWE definition for the vulnerability is CWE-190. The product performs a calculation that can produce an integer overflow or wraparound, when the logic assumes that the resulting value will always be larger than the original value. This can introduce other weaknesses when the calculation is used for resource management or execution control. As an impact it is known to affect availability. CVE summarizes:

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.

The advisory is available at github.com. This vulnerability was named CVE-2026-54903 since 06/16/2026. The exploitation appears to be easy. The attack can only be initiated within the local network. No form of authentication is required for a successful exploitation. Technical details are known, but there is no available exploit.

Upgrading to version 3.17.2 eliminates this vulnerability.

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Productinfo

Vendor

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Version

Website

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 4.3
VulDB Meta Temp Score: 4.1

VulDB Base Score: 4.3
VulDB Temp Score: 4.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Integer overflow
CWE: CWE-190 / CWE-189
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: oj 3.17.2

Timelineinfo

06/16/2026 CVE reserved
07/01/2026 +15 days Advisory disclosed
07/01/2026 +0 days VulDB entry created
07/01/2026 +0 days VulDB entry last update

Sourcesinfo

Product: github.com

Advisory: GHSA-475m-ph3x-64gp
Status: Confirmed

CVE: CVE-2026-54903 (🔒)
GCVE (CVE): GCVE-0-2026-54903
GCVE (VulDB): GCVE-100-374950

Entryinfo

Created: 07/01/2026 06:41
Changes: 07/01/2026 06:41 (67)
Complete: 🔍
Cache ID: 216::103

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