CVE-2026-12151
- Source
- https://cve.org/CVERecord?id=CVE-2026-12151
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-12151.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-12151
- Aliases
- Downstream
- Related
- Published
- 2026-06-17T16:05:38.785Z
- Modified
- 2026-07-11T03:54:26.925382139Z
- Severity
-
- 7.5 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H CVSS Calculator
- Summary
- undici WebSocket client vulnerable to denial of service via fragment count bypass
- Details
-
Impact: The undici WebSocket client enforces maxPayloadSize on the cumulative byte count of fragments in a message but does not enforce a limit on the number of fragments. A malicious WebSocket server can stream many small or empty continuation frames that each pass per-frame and cumulative-size validation, collectively causing unbounded memory growth in the client process. The result is memory exhaustion and a denial of service.
Affected applications are those using the undici WebSocket client (new WebSocket(...)) or the WebSocketStream API that can be induced to connect to an attacker-controlled or compromised WebSocket endpoint.
All releases starting at undici 6.17.0 are affected.
Patches: Upgrade to undici >= 6.26.0, >= 7.28.0, or >= 8.5.0. Workarounds: No workaround is available. The fix must be applied through an upgrade.
- Database specific
{ "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12151.json", "cna_assigner": "openjs", "cwe_ids": [ "CWE-400", "CWE-770" ] }- References
-
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-12151.json
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:35841
- https://access.redhat.com/errata/RHSA-2026:35842
- https://access.redhat.com/errata/RHSA-2026:35891
- https://access.redhat.com/errata/RHSA-2026:35892
- https://access.redhat.com/errata/RHSA-2026:36754
- https://access.redhat.com/errata/RHSA-2026:36820
- https://access.redhat.com/security/cve/CVE-2026-12151
- https://cna.openjsf.org/security-advisories.html
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/12xxx/CVE-2026-12151.json
- https://github.com/nodejs/undici/security/advisories/GHSA-vxpw-j846-p89q
- https://nvd.nist.gov/vuln/detail/CVE-2026-12151
- https://bugzilla.redhat.com/show_bug.cgi?id=2489980
Affected packages
Git / github.com/nodejs/undici
Affected ranges
- Type
- GIT
- Repo
- https://github.com/nodejs/undici
- Events
- Database specific
{ "source": "CPE_RANGE", "cpe": "cpe:2.3:a:nodejs:undici:*:*:*:*:*:node.js:*:*", "extracted_events": [ { "introduced": "6.17.0" }, { "fixed": "6.27.0" }, { "introduced": "7.0.0" }, { "fixed": "7.28.0" }, { "introduced": "8.0.0" }, { "fixed": "8.5.0" } ] }