Heap-based Buffer Overflow Affecting ruby3.4-fluentd-kubernetes-daemonset-1.16 package, versions <1.16.11.1.0-r2
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.
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Test your applications- Snyk IDSNYK-CHAINGUARDLATEST-RUBY34FLUENTDKUBERNETESDAEMONSET116-17686252
- published30 Jun 2026
- disclosed1 Jul 2026
Introduced: 30 Jun 2026
CVE-2026-54896 (opens in a new tab)How to fix?
Upgrade Chainguard ruby3.4-fluentd-kubernetes-daemonset-1.16 to version 1.16.11.1.0-r2 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream ruby3.4-fluentd-kubernetes-daemonset-1.16 package and not the ruby3.4-fluentd-kubernetes-daemonset-1.16 package as distributed by Chainguard.
See How to fix? for Chainguard 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, when in object mode, Oj.dump is vulnerable to a heap buffer overflow when serializing Exception objects with a large :indent value. The serializer allocates a buffer sized for the object's attributes but does not account for the indent bytes added on each write. With indent: 5000, the accumulation of 5,000-byte indent strings overflows the 13,150-byte heap allocation, corrupting adjacent heap memory. This issue has been fixed in version 3.17.2.