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NVD 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.
Priority
LOW
Exploitation
NONE
PoC
NONE
Patch
NONE
Momentum
NONE
If you run products in this scope, you should treat this CVE as relevant to your environment.
CVE-2026-48497 Denial of Service in Envoy UDP DNS Filter with 255-Octet Domain Names https://vulmon.com/vulnerabilitydetails?qid=CVE-2026-48497
Post summary
The text only discloses a DoS vulnerability in Envoy’s UDP DNS Filter involving 255‑octet domain names and does not provide proof of concept, exploit code, patch, or evidence of active exploitation.
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| Part | Vendor | Product | Version | Target SW | Target HW |
|---|---|---|---|---|---|
| App | envoyproxy | envoy | - | - | - |