Memory Leak Affecting kubo package, versions <0.39.0-r5
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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- published5 Mar 2026
- disclosed12 Feb 2026
Introduced: 12 Feb 2026
CVE-2026-21438 (opens in a new tab)How to fix?
Upgrade Wolfi kubo to version 0.39.0-r5 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream kubo package and not the kubo package as distributed by Wolfi.
See How to fix? for Wolfi relevant fixed versions and status.
webtransport-go is an implementation of the WebTransport protocol. Prior to 0.10.0, an attacker can cause unbounded memory consumption repeatedly creating and closing many WebTransport streams. Closed streams were not removed from an internal session map, preventing garbage collection of their resources. This vulnerability is fixed in v0.10.0.