{"id":"GHSA-xjj6-f33q-929c","revision":null,"records":[{"revision":"7dbd6eeab3244a168209cd814e7078a1","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-109869","aliases":[],"title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"undici is an HTTP client library for Node.js. In versions 6.23.0 through 6.29.0, 7.18.0 through 7.30.0, and 8.0.0 through 8.12.1, its fetch() implementation crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses because of a content-encoding limit, but it created the internal response stream before that check and returned without attaching an error listener or aborting the request, so the early close surfaces a content-length mismatch on the orphaned stream, which Node.js treats as an unhandled error and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the fetch() rejection, resulting in a denial of service. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, and users should upgrade to one of those versions or later. There is no workaround.","state":0,"publishedAt":"2026-10-15T18:08:31.243+00:00","modifiedAt":"2026-10-16T20:06:00.782+00:00","affected":[{"ecosystem":"Vendor product","name":"undici","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"undici\",\n                    \"product\": \"undici\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"6.23.0\",\n                            \"lessThan\": \"6.29.1\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"6.29.1\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"7.18.0\",\n                            \"lessThan\": \"7.30.1\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"7.30.1\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"affected\",\n                            \"version\": \"8.0.0\",\n                            \"lessThan\": \"8.12.2\"\n                        },\n                        {\n                            \"versionType\": \"semver\",\n                            \"status\": \"unaffected\",\n                            \"version\": \"8.12.2\"\n                        }\n                    ],\n                    \"packageURL\": \"pkg:npm/undici\"\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-xjj6-f33q-929c","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-109869","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-109869","identifiers":["CVE-2026-109869"]},"retained":false,"historicalAffected":[]},{"revision":"2a40b1dbb46d4feb927c57d3c353ede0","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-xjj6-f33q-929c","aliases":["CVE-2026-109869"],"title":"undici vulnerable to Denial of Service via unhandled error on excessive content-encodings","description":"### Impact\n\nundici's `fetch()` crashes the Node.js process when a malicious server returns a response with more than five content codings and closes the connection before sending the body. undici rejects such responses (a content-encoding limit), but it created the internal response stream before that check and returned without attaching an error listener or aborting the request. The early close then surfaces a content-length mismatch on that orphaned internal stream, which Node.js treats as an unhandled `error` and terminates the process. A remote, unauthenticated server can trigger this with a single response, even when the application correctly catches the `fetch()` rejection. undici 6.x, 7.x, and 8.x are affected.\n\n### Patches\n\nUpgrade to `6.29.1`, `7.30.1`, or `8.12.2`. undici now validates the content-encoding chain before creating the internal body stream and aborts the response when the limit is exceeded, so no error can surface on an orphaned stream.\n\n### Workarounds\n\nNone.","state":0,"publishedAt":"2026-10-23T22:14:31+00:00","modifiedAt":"2026-10-23T22:30:05.0076879+00:00","affected":[{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"6.23.0"},{"kind":"fixed","version":"6.29.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"7.18.0"},{"kind":"fixed","version":"7.30.1"}]}],"versions":[],"rawVersionEvidence":null},{"ecosystem":"npm","name":"undici","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"8.0.0"},{"kind":"fixed","version":"8.12.2"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/nodejs/undici/security/advisories/GHSA-xjj6-f33q-929c","https://nvd.nist.gov/vuln/detail/CVE-2026-109869","https://github.com/nodejs/undici/commit/07ded4941b1e72afec862958c3b8ddf468f3b429","https://github.com/nodejs/undici/commit/1325a87dfb3492f8e87e6b0a84b3bda4e82e3436","https://github.com/nodejs/undici/commit/b5084c7dc239172d75c336b1cd51ddac023938a5","https://cna.openjsf.org/security-advisories.html","https://github.com/nodejs/undici","https://github.com/nodejs/undici/releases/tag/v6.29.1","https://github.com/nodejs/undici/releases/tag/v7.30.1","https://github.com/nodejs/undici/releases/tag/v8.12.2"],"sourceUrl":"https://github.com/advisories/GHSA-xjj6-f33q-929c","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-xjj6-f33q-929c","identifiers":["GHSA-xjj6-f33q-929c","CVE-2026-109869"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-10-24T22:17:08.7944505+00:00","complete":true,"records":1756,"lastAttemptAt":"2026-10-24T22:17:08.7944505+00:00","lastSuccessAt":"2026-10-24T22:17:08.9832201+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.9832219+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-9b3cad78792c7367da03684feab05819ddebc4d137048bdbbdabdbb4d2879391-63961afb6610d7708229e0bcdfbc9ecfcc0bc3951f8093b20c1b03d054231263","complete":true,"records":413911,"lastAttemptAt":"2026-10-24T22:17:08.3778962+00:00","lastSuccessAt":"2026-10-24T22:17:08.3462485+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.3778962+00:00","snapshotPublishedAt":"2026-10-24T21:27:31+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-2bd69fab2c344523ab700c47f878b288","complete":false,"records":4671,"lastAttemptAt":"2026-10-24T22:29:18.3258644+00:00","lastSuccessAt":"2026-10-24T22:29:18.318+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:29:18.318+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":4700,"expectedIdentifiers":13474},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-10-24T22:17:08.7944505+00:00","complete":true,"records":1093,"lastAttemptAt":"2026-10-24T22:17:08.7944505+00:00","lastSuccessAt":"2026-10-24T22:17:08.9843953+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.984396+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-ea01e2e03fa6448d91d68ed624b16b4d","complete":false,"records":4971,"lastAttemptAt":"2026-10-24T22:17:34.1211112+00:00","lastSuccessAt":"2026-10-24T22:17:34.118+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:34.118+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":5000,"expectedIdentifiers":13474},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-2375a4e597279abf92e8747e140fe8da9d421877cd49cae3ac69a2cb78469b2c","complete":true,"records":9779,"lastAttemptAt":"2026-10-24T22:17:08.7432144+00:00","lastSuccessAt":"2026-10-24T13:19:53.1346702+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.7432144+00:00","snapshotPublishedAt":"2026-10-24T03:03:12+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-16ad89dfea13ab9e9b0108e63a759d63bd4559cc68b58491107d62ee35bbbaf2","complete":true,"records":1965,"lastAttemptAt":"2026-10-24T22:17:08.5372092+00:00","lastSuccessAt":"2026-10-23T16:01:26.4487605+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.5372092+00:00","snapshotPublishedAt":"2026-10-21T12:18:07+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-7da67a15aa6e56a0e3081a7646dc74d537e6ef974afc593c2b1794ed01970648","complete":true,"records":2969,"lastAttemptAt":"2026-10-24T22:17:08.7584157+00:00","lastSuccessAt":"2026-10-24T13:19:59.1145547+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.7584157+00:00","snapshotPublishedAt":"2026-10-24T08:47:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-01c673643721642d348dd2cebd6ec154e69bb7cd20a86eeae91240dc3610a60f","complete":true,"records":230735,"lastAttemptAt":"2026-10-24T22:17:08.6373833+00:00","lastSuccessAt":"2026-10-24T13:19:32.2429544+00:00","error":null,"lastVerifiedAt":"2026-10-24T22:17:08.6373833+00:00","snapshotPublishedAt":"2026-10-24T04:48:23+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null}]}