CVE-2026-48497
HIGH
MEDIUM
Priority: 0.03
BB Relevance:
75/100
Published: 2026-06-26
Modified: 2026-10-25
First seen: 2026-10-29
Status: active
Attack Surface
Network
Low Complexity
No Auth
No Interaction
CVSS Vector Breakdown
AV:
Network
AC:
Low
PR:
None
UI:
None
S:
Unchanged
C:
None
I:
None
A:
High
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.
Weakness Classification (1)
Affected Software (4)
| Vendor | Product | Version |
|---|---|---|
| envoyproxy | envoy | < 1.35.13 |
| envoyproxy | envoy | 1.36.0 – 1.36.9 |
| envoyproxy | envoy | 1.37.0 – 1.37.5 |
| envoyproxy | envoy | 1.38.0 – 1.38.3 |
References & Advisories (1)
Vendor Advisory