Technology · RubyGems
oj (RubyGems) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 11 vulnerabilities in oj (RubyGems): 0 in the last 7 days and 0 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-54903, was published on 1 July 2026.
- Last 7 days
- 0
- Last 90 days
- 0
- Critical, all time
- 0
- Exploited in the wild
- 0
About oj (RubyGems)
Oj is a fast JSON parser and object serializer for the Ruby programming language.
Latest oj (RubyGems) vulnerabilities
- CVE-2026-54903: ohler55 Oj integer overflow in Oj.load heap corruptionhighCVSS 4EPSS 0.4%
- CVE-2026-54902: ohler55 Oj use-after-free in Oj::Parser SAJ modehighCVSS 4EPSS 0.4%
- CVE-2026-54901: ohler55 Oj Use-After-Free in Oj::Parser GC markinghighCVSS 4EPSS 0.4%
- CVE-2026-54900: ohler55 Oj heap corruption in Oj::Parser via integer truncationhighCVSS 4EPSS 0.4%
- CVE-2026-54899: ohler55 Oj heap use-after-free in Oj::Parser symbol_keys togglehighCVSS 4EPSS 0.4%
- CVE-2026-54898: ohler55 Oj heap use-after-free in Oj::Parser#parsehighCVSS 4EPSS 0.2%
- CVE-2026-54897: ohler55 Oj heap use-after-free in Oj::Doc iteratorshighCVSS 4EPSS 0.2%
- CVE-2026-54896: ohler55 Oj heap buffer overflow in Exception serializationhighCVSS 4EPSS 0.2%
- CVE-2026-54592: ohler55 Oj stack buffer overflow in Oj::Doc#each_childhighCVSS 7.5EPSS 0.5%
- CVE-2026-54502: ohler55 Oj stack buffer overflow in Oj.dumphighCVSS 4EPSS 0.4%
- CVE-2026-54500: ohler55 Oj uninitialized stack memory read in intern.cmediumCVSS 5.3EPSS 0.3%
Most severe oj (RubyGems) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-54592: ohler55 Oj stack buffer overflow in Oj::Doc#each_childhighCVSS 7.5EPSS 0.5%
- CVE-2026-54903: ohler55 Oj integer overflow in Oj.load heap corruptionhighCVSS 4EPSS 0.4%
- CVE-2026-54902: ohler55 Oj use-after-free in Oj::Parser SAJ modehighCVSS 4EPSS 0.4%
- CVE-2026-54901: ohler55 Oj Use-After-Free in Oj::Parser GC markinghighCVSS 4EPSS 0.4%
- CVE-2026-54900: ohler55 Oj heap corruption in Oj::Parser via integer truncationhighCVSS 4EPSS 0.4%
- CVE-2026-54899: ohler55 Oj heap use-after-free in Oj::Parser symbol_keys togglehighCVSS 4EPSS 0.4%
- CVE-2026-54502: ohler55 Oj stack buffer overflow in Oj.dumphighCVSS 4EPSS 0.4%
- CVE-2026-54898: ohler55 Oj heap use-after-free in Oj::Parser#parsehighCVSS 4EPSS 0.2%
- CVE-2026-54897: ohler55 Oj heap use-after-free in Oj::Doc iteratorshighCVSS 4EPSS 0.2%
- CVE-2026-54896: ohler55 Oj heap buffer overflow in Exception serializationhighCVSS 4EPSS 0.2%
Vulnerabilities per week
Nothing was published in the last eight weeks. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 0 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many oj (RubyGems) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/oj)<a href="https://junglewise.ai/threats/technologies/oj"><img src="https://junglewise.ai/threats/technologies/oj/badge.svg" alt="oj (RubyGems) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/oj.json, and this page as text at https://junglewise.ai/threats/technologies/oj.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "oj (RubyGems) vulnerabilities", https://junglewise.ai/threats/technologies/oj, 13 November 2026.