{"cve":"CVE-2026-22036","nvd":{"published":"2026-01-14T19:16:47.833","modified":"2026-06-17T10:19:24.020","status":"Modified","description":"Undici is an HTTP/1.1 client for Node.js. Prior to 7.18.0 and 6.23.0, the number of links in the decompression chain is unbounded and the default maxHeaderSize allows a malicious server to insert thousands compression steps leading to high CPU usage and excessive memory allocation. This vulnerability is fixed in 7.18.0 and 6.23.0.","cvss_v4":null,"cvss_v3":{"version":"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},"cwes":["CWE-770"],"references":["https://github.com/nodejs/undici/commit/b04e3cbb569c1596f86c108e9b52c79d8475dcb3","https://github.com/nodejs/undici/security/advisories/GHSA-g9mf-h72j-4rw9"],"products":["nodejs:undici"],"source":"nvd","synced_at":"2026-10-19T22:19:41.481987139+00:00"},"epss":{"cve":"CVE-2026-22036","score":0.00457,"percentile":0.39633,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-g9mf-h72j-4rw9","url":"https://osv.dev/vulnerability/GHSA-g9mf-h72j-4rw9","summary":"Undici has an unbounded decompression chain in HTTP responses on Node.js Fetch API via Content-Encoding leads to resource exhaustion","modified":"2026-09-10T03:50:33.216915457Z","packages":[{"ecosystem":"npm","name":"undici","purl":"pkg:npm/undici","ranges":[">=7.0.0 <7.18.2"],"fixed":["7.18.2"]},{"ecosystem":"npm","name":"undici","purl":"pkg:npm/undici","ranges":["<6.23.0"],"fixed":["6.23.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}