Metrics
Affected Vendors & Products
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No solution given by the vendor.
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No workaround given by the vendor.
Sat, 17 Oct 2026 09:00:00 +0000
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Undici
Undici undici |
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| Vendors & Products |
Undici
Undici undici |
Fri, 16 Oct 2026 20:30:00 +0000
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| Metrics |
ssvc
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Fri, 16 Oct 2026 00:30:00 +0000
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| Metrics |
threat_severity
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threat_severity
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Thu, 15 Oct 2026 18:45:00 +0000
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| Description | 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 each per-origin pool, and because JSON cannot represent functions, a caller-supplied tls option containing a checkServerIdentity callback is silently dropped before it reaches the TLS layer. As a result, a TLS peer whose certificate a custom checkServerIdentity was written to reject, but which passes Node's default hostname and chain checks, is silently accepted. Because Agent is the default dispatcher behind request, fetch, and setGlobalDispatcher, this affects the path most applications use, and EnvHttpProxyAgent is affected on its direct and no-proxy routes as well, while only applications that pass a function-valued tls option such as a custom checkServerIdentity for certificate or public-key pinning are at risk. The issue is fixed in undici 6.29.1, 7.30.1, and 8.12.2, which preserve the tls option outside the JSON clone so custom verification callbacks are forwarded unchanged, and users should upgrade to one of those versions or later. As a workaround, pass the TLS options through connect instead of tls, or for proxied destinations use requestTls and proxyTls. | |
| Title | undici vulnerable to TLS certificate validation bypass via dropped tls options in Agent | |
| Weaknesses | CWE-295 | |
| References |
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| Metrics |
cvssV3_1
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Projects
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Status: PUBLISHED
Assigner: openjs
Published:
Updated: 2026-10-16T20:03:30.839Z
Reserved: 2026-10-12T14:29:57.987Z
Link: CVE-2026-109383
Updated: 2026-10-16T20:03:22.699Z
Status : Undergoing Analysis
Published: 2026-10-15T19:17:20.853
Modified: 2026-10-16T21:17:23.120
Link: CVE-2026-109383
OpenCVE Enrichment
Updated: 2026-10-17T08:45:05Z