undici has 14 CVEs on record. Disclosure cadence is accelerating: 13 in the last 90 days against 1 in the 90 before. The busiest recent month was October 2026 with 9. The median CVSS is 5.9 (medium). None have a confirmed exploitation report. The dominant weakness classes are CWE-248 (4) and CWE-770 (3).
CVEs per month
Last 12 months, by publish date
- Exploited share
- 0% vs 1% corpus
- Median CVSS
- 5.9
- Publish → KEV
- —
- Last 90 days
- 13 prev 1
Worst active — by depth score
CVE-2026-87018High· 7.5undici is an HTTP client library for Node.js41CVE-2026-109869High· 7.5undici is an HTTP client library for Node.js41CVE-2026-109855High· 7.5undici is an HTTP client library for Node.js41CVE-2026-109829High· 7.4undici is an HTTP client library for Node.js41CVE-2026-109383High· 7.4undici is an HTTP client library for Node.js41
undici vulnerabilities
CVEs affecting undici, newest first. Open any entry for full detail, references, and exploit status.
14 CVEsRSS
CVE-2026-87029Medium· 5.9undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 7.15.0 through 7.30.0 and 8.0.0 through 8.12.1, its decompress interceptor forwards decompressed response data to the downstream handler from zlib stream event callbacks without c…
CVE-2026-87018High· 7.5undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 4.2.1 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, the client process crashes when a TLS 1.2 server renegotiates after the connection is established and present…
CVE-2026-109932Medium· 5.9undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 5.15.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its WebSocket client, including the bundled WebSocket exposed by Node.js, can be driven to exhaust process m…
CVE-2026-109924Medium· 5.9undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 6.5.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its EventSource client can be driven to exhaust process memory by a malicious or compromised Server-Sent Even…
CVE-2026-109869High· 7.5undici is an HTTP client library for Node.js
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…
CVE-2026-109841Medium· 5.9undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 7.15.0 through 7.30.0 and 8.0.0 through 8.12.1, its fetch() implementation verifies Subresource Integrity metadata by matching the algorithm token against a lowercase-only set, ev…
CVE-2026-109829High· 7.4undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 7.0.0 through 7.30.0 and 8.0.0 through 8.12.1, when an originless Agent composes the redirect and cache interceptors in that order with a shared cache store, the cache builds its …
CVE-2026-109383High· 7.4undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 4.0.0 through 6.29.0, 7.0.0 through 7.30.0, and 8.0.0 through 8.12.1, its Agent dispatcher passes its constructor options through a JSON-based deep clone before forwarding them to…
CVE-2026-109855High· 7.5undici is an HTTP client library for Node.js
undici is an HTTP client library for Node.js. In versions 8.11.0 and 8.11.1, its experimental WebSocket client, which is enabled by default when HTTP/2 is allowed, mishandles a failed WebSocket handshake over HTTP/2: the request is alrea…
CVE-2026-16729Medium· 4.8undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields
undici vulnerable to cookie attribute injection via unsanitized domain and unparsed setCookie fields
CVE-2026-14643Medium· 5.9undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives
undici vulnerable to cross-user information disclosure via whitespace around equals in Cache-Control directives
CVE-2026-15157Medium· 4.2undici vulnerable to CRLF Injection via blob-like body 'type' property
undici vulnerable to CRLF Injection via blob-like body 'type' property
CVE-2026-16728Medium· 4.8undici vulnerable to downstream response desynchronization via retry interceptor
undici vulnerable to downstream response desynchronization via retry interceptor
CVE-2026-9675High· 7.5undici WebSocket client vulnerable to denial of service via cumulative fragment bypass
undici WebSocket client vulnerable to denial of service via cumulative fragment bypass