envoyproxy envoy up to 1.35.10/1.36.6/1.37.2/1.38.0 JSON Object excessively deep nesting

Summaryinfo

A vulnerability was found in envoyproxy envoy up to 1.35.10/1.36.6/1.37.2/1.38.0. It has been classified as problematic. The impacted element is an unknown function of the component JSON Object Handler. Performing a manipulation results in excessively deep nesting. This vulnerability is reported as CVE-2026-48042. The attack is possible to be carried out remotely. No exploit exists. Upgrading the affected component is recommended.

Detailsinfo

A vulnerability classified as problematic has been found in envoyproxy envoy up to 1.35.10/1.36.6/1.37.2/1.38.0. This affects an unknown code block of the component JSON Object Handler. The manipulation with an unknown input leads to a excessively deep nesting vulnerability. CWE is classifying the issue as CWE-1124. The code contains a callable or other code grouping in which the nesting / branching is too deep. This is going to have an impact on availability. The summary by CVE is:

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.35.11, 1.36.7, 1.37.3, and 1.38.1, destructor of JSON Object results in stack overflow when deeply O(100K) nested objects are present. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

The advisory is shared at github.com. This vulnerability is uniquely identified as CVE-2026-48042 since 05/20/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Neither technical details nor an exploit are publicly available.

Upgrading to version 1.35.11, 1.36.7, 1.37.3 or 1.38.1 eliminates this vulnerability.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Firewall Software

Vendor

• envoyproxy

Name

• envoy

Version

• 1.0
• 1.1
• 1.2
• 1.3
• 1.4
• 1.5
• 1.6
• 1.7
• 1.8
• 1.9
• 1.10
• 1.11
• 1.12
• 1.13
• 1.14
• 1.15
• 1.16
• 1.17
• 1.18
• 1.19
• 1.20
• 1.21
• 1.22
• 1.23
• 1.24
• 1.25
• 1.26
• 1.27
• 1.28
• 1.29
• 1.30
• 1.31
• 1.32
• 1.33
• 1.34
• 1.35
• 1.35.0
• 1.35.1
• 1.35.2
• 1.35.3
• 1.35.4
• 1.35.5
• 1.35.6
• 1.35.7
• 1.35.8
• 1.35.9
• 1.35.10
• 1.36
• 1.36.0
• 1.36.1
• 1.36.2
• 1.36.3
• 1.36.4
• 1.36.5
• 1.36.6
• 1.37
• 1.37.0
• 1.37.1
• 1.37.2
• 1.38.0

License

• free

Website

• Product: https://github.com/envoyproxy/envoy/

CPE 2.3info

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CPE 2.2info

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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