P4Verified

CVE-2026-0621: mcp typescript sdk through 1.25.1 (inclusive); +1 more affected products

CVE-2026-0621. CVSS 3.1 base score 7.5 (HIGH, NVD). EPSS 0.00438 (percentile 0.35976), scored 2026-10-06.

Affected technology

mcp typescript sdk · through 1.25.1 (inclusive)
lfprojects

MCP TypeScript SDK · 0 through 1.25.1
Anthropic

Description’s affected range: versions up to and including 1.25.1

Component: Not specified by the source

Attack conditions (Vendor/CNA, CVSS 4.0): Network (remote) · No privileges required · No user interaction required

What an attacker can do

The source reports that an attacker could disrupt service under the conditions described by the source. Vendor/CNA’s CVSS 4.0 assessment (base score 8.7/10) rates confidentiality and integrity impact as none; availability impact as high.

Published 2026-10-08 17:34:53.706946+00:00

CWE: CWE-1333
CCR priority: 30.1 /100 (P4)
CVSS 3.1: 7.5 /10 · CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H · NVD
EPSS: 0.00438 · percentile 0.36081 · 2026-10-08
KEV: no

Provenance

FIRST EPSS daily exploit-probability · Source record · observed 2026-10-08 17:36:22.845483+00:00 UTC
NVD CVE API 2.0 · Source record · observed 2026-10-08 17:32:11.049884+00:00 UTC

Stable permalink: https://cybercodered.org/item/cve-cve-2026-0621.html