CVE-2026-48042

Envoy: Stack overflow in destructor of highly nested JSON

At a glance

Severity: HIGH 7.5
EPSS: EPSS 0.56 % · percentile 46 (2026-10-27)
State: PUBLISHED
Published: 2026-06-26
Updated: 2026-06-29
Assigner: GitHub_M
NVD status: Analyzed

Description

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.

Scores

Version	Score	Vector	Scored by
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	GitHub_M
CVSS 3.1	HIGH 7.5	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	NVD · security-advisories@github.com (Secondary)

Weaknesses (CWE)

CWE-1124

European references

ENISA EUVD · EUVD-2026-39819
GCVE · GCVE-0-2026-48042

Affected configurations (NVD CPE)

cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.18.0 < 1.35.13
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.36.0 < 1.36.9
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.37.0 < 1.37.5
cpe:2.3:a:envoyproxy:envoy:*:*:*:*:*:*:*:* ≥ 1.38.0 < 1.38.3

Affected products

Product	Versions
envoyproxy · envoy	affected >= 1.38.0, < 1.38.1 ; affected >= 1.37.0, < 1.37.3 ; affected >= 1.36.0, < 1.36.7 ; affected < 1.35.11

References

Sources

Source	Licence
CVE List (CVEProject cvelistV5)	CVE Program Terms of Use
EPSS (FIRST.org)	FIRST — attribution requested
ENISA EUVD	ENISA — reproduction authorised, source acknowledged
NVD (NIST) via fkie-cad/nvd-json-data-feeds	Public domain — this product uses data from the NVD API but is not endorsed or certified by the NVD