Improper Input Validation Affecting azure-functions-extension-bundles-4 package, versions <4.36.0-r1
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-AZUREFUNCTIONSEXTENSIONBUNDLES4-17445250
- published24 Jun 2026
- disclosed22 Jun 2026
Introduced: 22 Jun 2026
CVE-2026-48109 (opens in a new tab)How to fix?
Upgrade Chainguard azure-functions-extension-bundles-4 to version 4.36.0-r1 or higher.
NVD Description
Note: Versions mentioned in the description apply only to the upstream azure-functions-extension-bundles-4 package and not the azure-functions-extension-bundles-4 package as distributed by Chainguard.
See How to fix? for Chainguard relevant fixed versions and status.
MessagePack for C# is a MessagePack serializer for C#. Prior to 2.5.301 and 3.1.7, A vulnerability exists in the optional LZ4 decompression path used by MessagePack compression modes Lz4Block and Lz4BlockArray. The decoder implementation is based on a deprecated fast-decompression algorithm that does not take a source-length bound. A remote attacker can send a crafted MessagePack payload with manipulated LZ4 token/length fields to force out-of-bounds reads from the compressed input buffer. In affected environments, this can trigger an AccessViolationException during decompression, causing process termination (denial of service). Under some conditions, limited unintended memory disclosure from over-read data may also be possible before failure. This vulnerability is fixed in 2.5.301 and 3.1.7.