Envoy: Abnormal process termination in DNS UDP filter
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.
- Products
- Not specified
- Affected versions
- Not specified
- Fixed versions
- Not specified
- CVEs
- CVE-2026-48497
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 3 Nov 2026, 18:11 UTC · Revision 1
Source evidence
Envoy: Abnormal process termination in DNS UDP filter
core-osv · Original sourcePublished 26 Jun 2026, 17:32 UTC
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.
osv:CVE-2026-48497
Complete source record
{
"id": "3e9013341c48182ff9192c71811661eac520b11a8ac89480bf045f9927257001",
"url": "https://osv.dev/vulnerability/CVE-2026-48497",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "Envoy: Abnormal process termination in DNS UDP filter",
"summary": "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.",
"evidence": "osv:CVE-2026-48497",
"products": [],
"severity": "medium",
"structured": {
"id": "CVE-2026-48497",
"aliases": [
"BIT-envoy-2026-48497",
"CVE-2026-48497",
"GHSA-j6g2-wf95-q66q"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H"
}
],
"affected": [
{
"ranges": [
{
"repo": "https://github.com/envoyproxy/envoy",
"type": "GIT",
"events": [
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"introduced": "0"
},
{
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],
"database_specific": {
"source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-48497.json"
}
}
],
"modified": "2026-10-28T02:30:31.272467580Z",
"provider": "osv",
"references": [
"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48497.json",
"https://github.com/envoyproxy/envoy/security/advisories/GHSA-j6g2-wf95-q66q",
"https://nvd.nist.gov/vuln/detail/CVE-2026-48497"
],
"provider_metadata": {
"cwe_ids": [
"CWE-480"
],
"cna_assigner": "GitHub_M",
"osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/48xxx/CVE-2026-48497.json"
}
},
"related_cves": [
{
"value": "CVE-2026-48497",
"evidence": "/id"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 498307,
"published_at": "2026-06-26T17:32:58.31+00:00"
}