CVE-2026-1528

Aliases:GHSA-f269-vfmq-vjvj
Advisory lineage Upstream: 0 Downstream: 10
Analyzed
Published: 12 Mar 2026, 20:21
Last modified:15 Jul 2026, 01:21

Vulnerability Summary

Overall Risk (default)
medium
30/100
CVSS Score
7.5 HIGH
v3.1 (cve.org)
EPSS Score
0.49% LOW
0% probability +0.37%
KEV
Not listed
Ransomware
No reports
Public exploits
None found
Dark Web
Not detected

Timeline

12 Mar 2026, 20:21
Published
Vulnerability first disclosed
15 Jul 2026, 01:21
Last Modified
Vulnerability information updated

Description

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 Metrics

  • v3.1•HIGH•Score: 7.5CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

EPSS Trends

Current EPSS score: 0.49%• Percentile: 39%

Techniques & Countermeasures

  • CWE-248•Uncaught Exception

    An exception is thrown from a function, but it is not caught.

  • CWE-1284•Improper Validation of Specified Quantity in Input

    The product receives input that is expected to specify a quantity (such as size or length), but it does not validate or incorrectly validates that the quantity has the required properties.

Affected Systems

  • nodejs•undici

    < 6.24.0 | ≥ 7.0.0, < 7.24.0

  • Npm•undici

    ≥ 6.0.0, < 6.24.0 | ≥ 7.0.0, < 7.24.0

  • undici•undici

    ≥ 6.0.0 < 6.24.0; 7.0.0 < 7.24.0

References (23)