CVSS 3.1
7.5 highCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HCVE-2026-22036
High (7.5) in nodejs undici. EPSS 0.5% chance of exploitation in the next 30 days. Fixed in undici 6.23.0, 7.18.2.
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.
Severity
- EPSS
- 0.5% chance of exploitation in the next 30 days; higher than 39% of CVEs (scores of 2026-10-31)
- CWE
- CWE-770
- Published
- Modified
- Record from
- the NVD, synced
Affected
- nodejs:undici
Packages (OSV)
| Advisory | Ecosystem | Package | Affected | Fixed in |
|---|---|---|---|---|
| GHSA-g9mf-h72j-4rw9 | npm | undici | >=7.0.0 <7.18.2 | 7.18.2 |
| GHSA-g9mf-h72j-4rw9 | npm | undici | <6.23.0 | 6.23.0 |