undici vulnerable to Denial of Service via orphaned RetryHandler response body
### Impact undici's `RetryHandler` can leave a response body pending indefinitely. When a retried request receives a non-retryable response after a truncated one, the original `response.body` held by the application is never settled, so reads such as `response.body.text()` hang and `bodyTimeout` does not fire. A malicious server can repeat this to accumulate pending promises and streams, leading to denial of service. ### Patches Patched in undici v7.29.1 and v8.10.2. ### Workarounds Impose an independent request deadline and destroy the response body when it expires. `bodyTimeout` alone does not prevent this.
describes (1)
Related CVEs.
| ID | severity | exploitable | ||
|---|---|---|---|---|
| CVE-2026-18149US | — | — | ||
undici's retry handler can leave an already-exposed response body pending forever. When a server returns a successful response that declares a Content-Length, sends only part of th… | ||||
references
External citations — patches, advisories, analysis.
- https://cna.openjsf.org/security-advisories.htmlWEB
- https://github.com/nodejs/undiciPACKAGE
- https://github.com/nodejs/undici/commit/3c6726599cea8646384dde846c97d630da472a74WEB
- https://github.com/nodejs/undici/commit/e905b5b87e6953bcc542af90557b2fee5b7b5974WEB
- https://github.com/nodejs/undici/releases/tag/v7.29.1WEB
- https://github.com/nodejs/undici/releases/tag/v8.10.2WEB
- https://github.com/nodejs/undici/security/advisories/GHSA-pmjh-fq2x-6v4xWEB
- https://hackerone.com/reports/3892751WEB
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