CVE-2026-1528ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length.
Updated under an hour ago ()
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It affects nodejs undici. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length. undici's ByteParser overflows internal math, ends up in an invalid state, and throws a fatal TypeError that terminates the process. Patches Patched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.
- CVSS
- 7.5 HIGH (v3.1, NVD)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-248, CWE-1284
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- Not given
- NVD analysis
- Modified
- Record last updated
- Sep 4, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
nodejs undici nodejs:undici | before 6.24.0; from 7.0.0 before 7.24.0 | NVD |
References
- https://cna.openjsf.org/security-advisories.htmlvendor-advisory
- https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvjvendor-advisory
- https://hackerone.com/reports/3537648permissions-required
- https://access.redhat.com/errata/RHSA-2026:13826
- https://access.redhat.com/errata/RHSA-2026:17789
- https://access.redhat.com/errata/RHSA-2026:21772
- https://access.redhat.com/errata/RHSA-2026:21931
- https://access.redhat.com/errata/RHSA-2026:34342
- https://access.redhat.com/errata/RHSA-2026:5807
- https://access.redhat.com/errata/RHSA-2026:7080
- https://access.redhat.com/errata/RHSA-2026:7123
- https://access.redhat.com/errata/RHSA-2026:7302
- https://access.redhat.com/errata/RHSA-2026:7310
- https://access.redhat.com/errata/RHSA-2026:7350
- https://access.redhat.com/errata/RHSA-2026:7670
- https://access.redhat.com/errata/RHSA-2026:7675
- https://access.redhat.com/errata/RHSA-2026:7983
- https://access.redhat.com/errata/RHSA-2026:9742
- https://access.redhat.com/security/cve/CVE-2026-1528
- https://bugzilla.redhat.com/show_bug.cgi?id=2447145
- https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1528.json
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.