Technology · npm
undici (npm) vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 53 vulnerabilities in undici (npm): 0 in the last 7 days and 20 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-87029, was published on 15 October 2026. 9 vulnerabilities in the last four weeks, up from none in the four before.
- Last 7 days
- 0
- Last 90 days
- 20
- Critical, all time
- 0
- Exploited in the wild
- 0
About undici (npm)
Undici is an HTTP/1.1 client for Node.js written entirely in JavaScript.
Latest undici (npm) vulnerabilities
- CVE-2026-87029: undici HTTP client denial of service in decompress interceptormediumCVSS 5.9EPSS 0.3%
- CVE-2026-87018: undici denial of service via TLS 1.2 certificate renegotiationhighCVSS 7.5EPSS 0.2%
- CVE-2026-109932: undici WebSocket client denial of service via unbounded PONG bufferingmediumCVSS 5.9EPSS 0.3%
- CVE-2026-109924: undici EventSource memory exhaustion denial of servicemediumCVSS 5.9EPSS 0.3%
- CVE-2026-109869: undici HTTP client denial of service via excessive content-encodingshighCVSS 7.5EPSS 0.3%
- CVE-2026-109841: undici Subresource Integrity bypass via non-lowercase algorithm tokensmediumCVSS 5.9EPSS 0.3%
- CVE-2026-109829: undici cache poisoning and cross-user disclosure via cross-origin redirectshighCVSS 7.4EPSS 0.1%
- CVE-2026-109383: undici HTTP client TLS certificate validation bypass in AgenthighCVSS 7.4EPSS 0.2%
- CVE-2026-109855: undici WebSocket client denial of service via failed HTTP/2 handshakehighCVSS 7.5EPSS 0.3%
- CVE-2026-84890: undici decompress interceptor unbounded decompression DoSmediumCVSS 5.9EPSS 0.4%
- CVE-2026-19534: undici WebSocket client denial of service via unrequested subprotocolhighCVSS 7.5EPSS 0.4%
- CVE-2026-18540: Node.js undici downstream response splitting via retry interceptorlowCVSS 3.7EPSS 0.2%
- CVE-2026-18149: undici retry handler response body leakmediumCVSS 5.9EPSS 0.4%
- CVE-2026-85152: undici cross-origin cache poisoning via missing origin isolationhighCVSS 7.4EPSS 0.2%
- CVE-2026-85024: undici WebSocket permessage-deflate denial of servicemediumCVSS 5.9EPSS 0.4%
- CVE-2026-85014: undici WebSocketStream denial of service via unclean closemediumCVSS 5.9EPSS 0.5%
- CVE-2026-85008: undici cache interceptor unsafe HTTP method cachinglowCVSS 3.7EPSS 0.2%
- CVE-2026-84961: undici BalancedPool TLS certificate validation bypass via dropped connect optionshighCVSS 7.4EPSS 0.3%
- CVE-2026-84947: undici response truncation via oversized chunked responses in dump interceptorlowCVSS 3.7EPSS 0.3%
- CVE-2026-84933: undici cache interceptor Set-Cookie disclosure in shared cachesmediumCVSS 6.5EPSS 0.3%
- CVE-2026-15157: undici CRLF injection in blob-like request body type propertymediumCVSS 4.2EPSS 0.2%
- CVE-2026-14643: Node.js undici information disclosure via Cache-Control whitespace bypassmediumCVSS 5.9EPSS 0.4%
- CVE-2026-16728: Node.js undici response desynchronization in retry interceptormediumCVSS 4.8EPSS 0.2%
- CVE-2026-16729: Node.js undici cookie attribute injection in setCookiemediumCVSS 4.8EPSS 0.2%
- CVE-2026-13697: undici information disclosure and crash in cache interceptorhighCVSS 7.4EPSS 0.6%
Most severe undici (npm) vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-1526: Node.js undici DoS via unbounded WebSocket decompression memory consumptionhighCVSS 7.5EPSS 1.1%
- CVE-2026-2229: Node.js undici denial of service via invalid WebSocket compression parametershighCVSS 7.5EPSS 0.9%
- CVE-2026-12151: Node.js undici denial of service in WebSocket fragment handlinghighCVSS 7.5EPSS 0.8%
- CVE-2026-9675: Node.js undici denial of service via cumulative WebSocket fragment bypasshighCVSS 7.5EPSS 0.5%
- CVE-2026-1528: Node.js undici denial of service via WebSocket length overflowhighCVSS 7.5EPSS 0.5%
- CVE-2026-19534: undici WebSocket client denial of service via unrequested subprotocolhighCVSS 7.5EPSS 0.4%
- CVE-2026-6734: Node.js undici cross-origin request routing in SOCKS5 ProxyAgenthighCVSS 7.5EPSS 0.4%
- CVE-2026-109869: undici HTTP client denial of service via excessive content-encodingshighCVSS 7.5EPSS 0.3%
- CVE-2026-109855: undici WebSocket client denial of service via failed HTTP/2 handshakehighCVSS 7.5EPSS 0.3%
- CVE-2026-87018: undici denial of service via TLS 1.2 certificate renegotiationhighCVSS 7.5EPSS 0.2%
Vulnerabilities per week
9 vulnerabilities in the last four weeks, up from none in the four before. The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 11 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 | |
| 5 Oct 2026 | 0 | 0 | |
| 12 Oct 2026 | 9 | 0 | |
| 19 Oct 2026 | 0 | 0 | |
| 26 Oct 2026 | 0 | 0 | |
| 2 Nov 2026 | 0 | 0 | |
| 9 Nov 2026 | 0 | 0 |
Embed a badge
A live badge for a README, a status page or an internal wiki: how many undici (npm) vulnerabilities were published in the last 7 days and how many of them are critical, refreshed hourly.
[](https://junglewise.ai/threats/technologies/undici)<a href="https://junglewise.ai/threats/technologies/undici"><img src="https://junglewise.ai/threats/technologies/undici/badge.svg" alt="undici (npm) vulnerabilities" /></a>How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/undici.json, and this page as text at https://junglewise.ai/threats/technologies/undici.md, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "undici (npm) vulnerabilities", https://junglewise.ai/threats/technologies/undici, 13 November 2026.