CVE Explorer
CVE-2026-6733
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-ali
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0
Affected products and versions
1 source assertion{"defaultStatus":"unaffected","packageURL":"pkg:npm/undici","product":"undici","vendor":"undici","versions":[{"lessThan":"6.26.0","status":"affected","version":"0","versionType":"semver"},{"status":"unaffected","version":"6.26.0","versionType":"semver"},{"lessThan":"7.28.0","status":"affected","version":"7.0.0","versionType":"semver"},{"status":"unaffected","version":"7.28.0","versionType":"semver"},{"lessThan":"8.5.0","status":"affected","version":"8.0.0","versionType":"semver"},{"status":"unaffected","version":"8.5.0","versionType":"semver"}]}
- cve_program_cvelist_v5affectedurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/affected/0
Provider-owned CVSS observations
1 source assertion{"metric":{"baseScore":3.7,"baseSeverity":"LOW","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
- cve_program_cvelist_v5cvssurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/metrics/0/cvssV3_1
CWE assertions
1 source assertion{"cweId":"CWE-367","description":"CWE-367: Time-of-check Time-of-use (TOCTOU) Race Condition","lang":"en","type":"CWE"}
- cve_program_cvelist_v5cweurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/problemTypes/0/descriptions/0
Source references
3 source assertions{"url":"https://cna.openjsf.org/security-advisories.html"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/references/2
{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-35p6-xmwp-9g52"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/references/0
{"url":"https://hackerone.com/reports/3582376"}
- cve_program_cvelist_v5referenceurn:baitaphish:normalized-source-record:v2:c811fa9b7425bbdfbb3b92eba353f8f484f1a4575e90b82c6955acbe3f3dbc10 · sha256:29c28a0aa529197a… · /containers/cna/references/1
Attribution and limitations
- CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →
Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.