CVE-2026-6733
CVE.org · Published
- Record status
- Published
- Identifier year (not publication year)
- 2026
- Source publication
- Source updated
- Imported by cveboard
- Source snapshot
- cve_2026-10-24_midnight_baseline ·
CNA source text (English)
undici vulnerable to HTTP response queue poisoning via keep-alive socket reuse
Impact: Undici's HTTP/1.1 client is vulnerable to response queue poisoning on reused keep-alive sockets. An attacker-controlled upstream server can inject an unsolicited HTTP/1.1 response onto an idle socket after a request completes. When the client dispatches the next request on that socket, it associates the injected response with the new request, causing responses to be delivered to the wrong requests. This requires an attacker-controlled or compromised upstream HTTP/1.1 server and keep-alive connection reuse. Patches: Upgrade to undici v6.26.0, v7.28.0 or v8.5.0. Workarounds: Disable keep-alive connection reuse by setting keepAliveTimeout: 0 on the Client or Pool.
Scoped product and version facts
Fix information unknown; no fixed version is derived here. Missing information does not prove that no fix exists.
Exploitation unknown; this catalogue does not assess exploitation.
undici
- Vendor
- undici
- Product
- undici
- Platforms
- Unknown
- Default status
unaffected
| Version (version) | Status (status) | Version scheme (versionType) | Exclusive end (lessThan) | Inclusive end (lessThanOrEqual) | Status changes (at → status) |
|---|---|---|---|---|---|
| 0 | affected | semver | 6.26.0 | Unavailable | None listed |
| 6.26.0 | unaffected | semver | Unavailable | Unavailable | None listed |
| 7.0.0 | affected | semver | 7.28.0 | Unavailable | None listed |
| 7.28.0 | unaffected | semver | Unavailable | Unavailable | None listed |
| 8.0.0 | affected | semver | 8.5.0 | Unavailable | None listed |
| 8.5.0 | unaffected | semver | Unavailable | Unavailable | None listed |