undici is vulnerable to Malicious WebSocket 64-bit length overflows undici parser and crashes the client
cve-program · CVE-2026-1528
PublishedImpactA 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.
Read the publisher's advisoryeuvd · EUVD-2026-11703
PublishedImpactA 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.
Read the publisher's advisorynvd · CVE-2026-1528
PublishedImpactA 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.
Read the publisher's advisoryosv · GHSA-f269-vfmq-vjvj
Published### Impact A 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. ### Workarounds There are no workarounds.
Read the publisher's advisoryAffected versions, risk and source history
Related advisories and sources
Publishers link these advisories through the identifiers shown below. A shared identifier or date alone does not tell you whether your software is affected or whether the advisories describe the same cause.
CVE-2026-1528 · CVE overview and exploitation status
cve-program · CVE-2026-1528
- https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj
- https://hackerone.com/reports/3537648
- https://cna.openjsf.org/security-advisories.html
euvd · EUVD-2026-11703
- https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj
- https://hackerone.com/reports/3537648
- https://cna.openjsf.org/security-advisories.html
nvd · CVE-2026-1528
- https://cna.openjsf.org/security-advisories.html
- https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj
- https://hackerone.com/reports/3537648
- 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
osv · GHSA-f269-vfmq-vjvj
Related changes
Linked by CVE identifierNo related changes are available here.