{"id":"CVE-2026-1528","title":"ImpactA server can reply with a WebSocket frame using the 64-bit length form and an extremely large length","summary":"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 proces…","severity":"high","cvss":7.5,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwe":["CWE-248","CWE-1284"],"vendor":"nodejs","product":"undici","affected":["undici < 6.24.0","undici >= 7.0.0, < 7.24.0"],"patched":["undici 7.24.0"],"published":"2026-03-12","updated":"2026-07-02","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-1528","references":[{"url":"https://cna.openjsf.org/security-advisories.html","label":"ce714d77-add3-4f53-aff5-83d477b104bb"},{"url":"https://github.com/nodejs/undici/security/advisories/GHSA-f269-vfmq-vjvj","label":"ce714d77-add3-4f53-aff5-83d477b104bb"},{"url":"https://hackerone.com/reports/3537648","label":"ce714d77-add3-4f53-aff5-83d477b104bb"},{"url":"https://access.redhat.com/errata/RHSA-2026:13826","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:17789","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:21772","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:21931","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:34342","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:5807","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7080","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7123","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7302","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7310","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7350","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7670","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7675","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:7983","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/errata/RHSA-2026:9742","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://access.redhat.com/security/cve/CVE-2026-1528","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2447145","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1528.json","label":"0b0ca135-0b70-47e7-9f44-1890c2a1c46c"},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-1528"},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-1528"}],"tags":["nvd","csaf","vex","red-hat","cve.org"],"epss":0.00488,"epssPercentile":0.4114,"ingestedAt":"2026-07-02T12:34:40.379Z","ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-03-13T13:03:59.738320Z"},"slug":"CVE-2026-1528","body":"## Overview\n\nImpactA 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.\n\nPatches\n\nPatched in the undici version v7.24.0 and v6.24.0. Users should upgrade to this version or later.\n\n## Affected\n\n- `undici < 6.24.0`\n- `undici >= 7.0.0, < 7.24.0`\n\n## Remediation\n\nUpgrade past the affected range:\n\n- `undici 7.24.0`\n\n## Vendor advisories\n\n- **RHSA-2026:17789** · Red Hat · fixed in: Cryostat 4 on RHEL 9 · released 2026-05-26 · [advisory](https://access.redhat.com/errata/RHSA-2026:17789)\n- **RHSA-2026:7310** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v. 10.0) · released 2026-04-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:7310)\n- **RHSA-2026:7080** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-04-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:7080)\n- **RHSA-2026:7675** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 10) · released 2026-04-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:7675)\n- **RHSA-2026:7123** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-04-08 · [advisory](https://access.redhat.com/errata/RHSA-2026:7123)\n- **RHSA-2026:7670** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 8) · released 2026-04-13 · [advisory](https://access.redhat.com/errata/RHSA-2026:7670)\n- **RHSA-2026:7983** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream EUS (v.9.6) · released 2026-04-14 · [advisory](https://access.redhat.com/errata/RHSA-2026:7983)\n- **RHSA-2026:7302** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-04-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:7302)\n- **RHSA-2026:7350** · Red Hat · fixed in: Red Hat Enterprise Linux AppStream (v. 9) · released 2026-04-09 · [advisory](https://access.redhat.com/errata/RHSA-2026:7350)\n- **RHSA-2026:34342** · Red Hat · fixed in: Cluster Observability Operator 1.5.0 · released 2026-07-01 · [advisory](https://access.redhat.com/errata/RHSA-2026:34342)\n- **RHSA-2026:9742** · Red Hat · fixed in: Red Hat Developer Hub 1.8 · released 2026-04-22 · [advisory](https://access.redhat.com/errata/RHSA-2026:9742)\n- **Red Hat VEX** · Important · affected: OpenShift Lightspeed, OpenShift Pipelines, Red Hat Developer Hub, Red Hat OpenShift AI (RHOAI), Self-service automation portal 2 · no fix planned: Red Hat Developer Hub, OpenShift Lightspeed, OpenShift Pipelines, Red Hat OpenShift AI (RHOAI), … · updated 2026-09-12 · [vex](https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-1528.json)","depth":"twilight","depthScore":41,"depthScoreParts":{"impact":41.3,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}