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CVE-2026-48497

MEDIUM
5.9
CVSS 3.1
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, in cases where UDP DNS filter is configured with local resolution containing a name with the length of 255 octets or remote resolution for a name of 255 octets long can complete successfully, a query with such name will result in abnormal process termination. The abnormal process termination is triggered by an invalid runtime precondition that the query name is strictly less than 255 octets, contradicting DNS specification rfc1035#section-2.3.4 that the name can be 255 or less octets. This vulnerability is fixed in 1.35.11, 1.36.7, 1.37.3, and 1.38.1.

Metadata

CVE ID
CVE-2026-48497
State
PUBLISHED
Assigner
GitHub_M
Reserved
2026-05-21 15:33 UTC
Published
2026-06-26 17:32 UTC
Last updated
2026-06-26 18:32 UTC
Primary CWE
CWE-480
CWE-480: Use of Incorrect Operator
Vendor / Product
envoyproxy / envoy
Sources
cve.org  ·  NVD

Severity & Metrics

5.9 MEDIUM CVSS 3.1
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
SSVC — CISA Coordinator
Exploitation
none
Automatable
no
Tech. Impact
partial
Affected products (1)
VendorProductPlatformVersions
envoyproxy envoy — >= 1.38.0, < 1.38.1, >= 1.37.0, < 1.37.3, >= 1.36.0, < 1.36.7, < 1.35.11
Weakness (CWE)
CWESourceDescription
CWE-480 cna CWE-480: Use of Incorrect Operator
CVSS scores (1)
ScoreSeverityVersionSourceVector
5.9 MEDIUM 3.1 cna CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H
References (1)
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