{"id":"CVE-2026-26310","aliases":["BIT-envoy-2026-26310","EUVD-2026-10802","GHSA-3cw6-2j68-868p"],"status":"published","title":"Crash for scoped ip address in Envoy during DNS","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","severity":{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00437,"percentile":0.38427,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-20"],"published":"2026-03-10T18:16:26Z","modified":"2026-10-28T02:30:24Z","fixes":[{"ecosystem":"Bitnami","package":"envoy","fixed_in":["1.34.13","1.35.9","1.36.5","1.37.1"],"sources":["osv"]}],"affected":[{"source":"ghsa","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.37.0"},{"last_affected":"1.37.0"}]}],"versions":["1.37.0"]},{"source":"ghsa","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.36.0"},{"last_affected":"1.36.4"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"1.35.0"},{"last_affected":"1.35.8"}]}]},{"source":"ghsa","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"1.34.12"}]}]},{"source":"osv","ecosystem":"Bitnami","package":"envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"1.34.13"},{"introduced":"1.35.0"},{"fixed":"1.35.9"},{"introduced":"1.36.0"},{"fixed":"1.36.5"},{"introduced":"1.37.0"},{"fixed":"1.37.1"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/envoyproxy/envoy","versions":["1.37.0"]},{"source":"osv","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"1.36.0"},{"last_affected":"1.36.4"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"1.35.0"},{"last_affected":"1.35.8"}]}]},{"source":"osv","ecosystem":"Go","package":"github.com/envoyproxy/envoy","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"last_affected":"1.34.12"}]}]}],"products":[{"vendor":"envoyproxy","product":"envoy"}],"references":[{"url":"https://github.com/envoyproxy/envoy/security/advisories/GHSA-3cw6-2j68-868p","tags":["x_refsource_CONFIRM","Exploit","Vendor Advisory","advisory","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-26310","tags":["web","advisory"]},{"url":"https://github.com/advisories/GHSA-3cw6-2j68-868p"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/26xxx/CVE-2026-26310.json","tags":["advisory"]},{"url":"https://github.com/envoyproxy/envoy","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-26310","title":"Crash for scoped ip address in Envoy during DNS","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","status":"published","published":"2026-03-10T19:08:22.33Z","modified":"2026-03-10T20:12:40.343Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"cna"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T13:38:20.971157Z"}],"euvd":[{"id":"EUVD-2026-10802","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","status":"published","published":"2026-03-10T19:08:22Z","modified":"2026-03-10T20:12:40Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"updated_at":"2026-11-02T19:48:04.718931Z"}],"ghsa":[{"id":"GHSA-3cw6-2j68-868p","title":"Envoy vulnerable to crash for scoped ip address during DNS","description":"### Summary\n\nCalling `Utility::getAddressWithPort` with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter.\n\n### Details\n\nThe crashing function is `Utility::getAddressWithPort`. The crash occurs if a string containing a scoped IPv6 address is passed to this function.\n\nThis vulnerability affects:\n\n1. The **original src filter**: If the filter is configured and the original source is a scoped IPv6 address, it will cause a crash.\n2. **DNS response address resolution**: If a DNS response contains a scoped IPv6 address, this will also trigger the crash.\n\n### PoC\n\nTo reproduce the vulnerability:\n\n1. **Method A (Original Src Filter):** Configure the `original src` filter in Envoy and provide a scoped IPv6 address as the original source.\n2. **Method B (DNS Resolution):** Trigger a DNS resolution process within Envoy where the DNS response contains a scoped IPv6 address.\n\n### Impact\n\nThis is a Denial of Service (DoS) vulnerability. It impacts users who have the `original src` filter configured or whose Envoy instances resolve addresses from DNS responses that may contain scoped IPv6 addresses.","status":"published","published":"2026-03-10T18:16:26Z","modified":"2026-03-11T20:42:27Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:39:34.616253Z"}],"nvd":[{"id":"CVE-2026-26310","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","status":"published","published":"2026-03-10T20:16:36.03Z","modified":"2026-06-17T10:26:04.063Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium","assessor":"secondary"},{"version":"3.1","score":7.5,"vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"high","assessor":"primary"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T14:12:08.98071Z"}],"osv":[{"id":"CVE-2026-26310","title":"Crash for scoped ip address in Envoy during DNS","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","status":"published","published":"2026-03-10T19:08:22.33Z","modified":"2026-10-28T02:30:24.192438272Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:44:59.80315Z"},{"id":"GHSA-3cw6-2j68-868p","title":"Envoy vulnerable to crash for scoped ip address during DNS","description":"### Summary\n\nCalling `Utility::getAddressWithPort` with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter.\n\n### Details\n\nThe crashing function is `Utility::getAddressWithPort`. The crash occurs if a string containing a scoped IPv6 address is passed to this function.\n\nThis vulnerability affects:\n\n1. The **original src filter**: If the filter is configured and the original source is a scoped IPv6 address, it will cause a crash.\n2. **DNS response address resolution**: If a DNS response contains a scoped IPv6 address, this will also trigger the crash.\n\n### PoC\n\nTo reproduce the vulnerability:\n\n1. **Method A (Original Src Filter):** Configure the `original src` filter in Envoy and provide a scoped IPv6 address as the original source.\n2. **Method B (DNS Resolution):** Trigger a DNS resolution process within Envoy where the DNS response contains a scoped IPv6 address.\n\n### Impact\n\nThis is a Denial of Service (DoS) vulnerability. It impacts users who have the `original src` filter configured or whose Envoy instances resolve addresses from DNS responses that may contain scoped IPv6 addresses.","status":"published","published":"2026-03-10T18:16:26Z","modified":"2026-03-13T20:26:16.308245Z","cvss":[{"version":"3.1","score":5.9,"vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:H","level":"medium"}],"cwes":["CWE-20"],"updated_at":"2026-11-02T15:46:35.747385Z"},{"id":"BIT-envoy-2026-26310","title":"Crash for scoped ip address in Envoy during DNS","description":"Envoy is a high-performance edge/middle/service proxy. Prior to 1.37.1, 1.36.5, 1.35.8, and 1.34.13, calling Utility::getAddressWithPort with a scoped IPv6 addresses causes a crash. This utility is called in the data plane from the original_src filter and the dns filter. This vulnerability is fixed in 1.37.1, 1.36.5, 1.35.8, and 1.34.13.","status":"published","published":"2026-03-12T08:39:44.551Z","modified":"2026-09-08T08:47:28.598482402Z","updated_at":"2026-11-02T15:28:29.563843Z"}]}}