Use After Free Affecting ruby3.4-fluentd-kubernetes-daemonset-1.18 package, versions <1.18.0.1.5-r3
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
Do your applications use this vulnerable package?
In a few clicks we can analyze your entire application and see what components are vulnerable in your application, and suggest you quick fixes.
Test your applications- Snyk IDSNYK-WOLFILATEST-RUBY34FLUENTDKUBERNETESDAEMONSET118-17671934
- published29 Jun 2026
- disclosed1 Jul 2026
Introduced: 29 Jun 2026
NewCVE-2026-54898 (opens in a new tab)How to fix?
Upgrade Wolfi ruby3.4-fluentd-kubernetes-daemonset-1.18 to version 1.18.0.1.5-r3 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.4-fluentd-kubernetes-daemonset-1.18 package and not the ruby3.4-fluentd-kubernetes-daemonset-1.18 package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
Oj (Optimized JSON) is a JSON parser and Object marshaller packaged as a Ruby gem. In versions prior to 3.17.2,Oj::Parser#parse is vulnerable to a heap use-after-free when a SAJ/SAJ2 callback mutates the input JSON string during parsing. The C engine holds a raw const byte * pointer into the Ruby string's internal buffer. If a callback (e.g. hash_start) resizes the string — for example by calling String#replace with a longer value — Ruby reallocates the string buffer and frees the old one. The C parser's pointer is left dangling; the next character read at parser.c:607 is a use-after-free. This issue has been fixed in version 3.17.2.