Anthropic's MCP TypeScript SDK versions up to and including 1.25.1 contain a regular expression denial of service (ReDoS) vulnerability in the UriTemplate class when processing RFC 6570 exploded array patterns. The dynamically generated reg…
Exact source revision recorded 1 Nov 2026 01:20:23 UTC. It does not establish the source's current position. Latest evidence.
euvd · EUVD-2026-0800
PublishedAnthropic's MCP TypeScript SDK versions up to and including 1.25.1 contain a regular expression denial of service (ReDoS) vulnerability in the UriTemplate class when processing RFC 6570 exploded array patterns. The dynamically generated regular expression used during URI matching contains nested quantifiers that can trigger catastrophic backtracking on specially crafted inputs, resulting in excessive CPU consumption. An attacker can exploit this by supplying a malicious URI that causes the Node.js process to become unresponsive, leading to a denial of service.
EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON.
Original publisher date fields
datePublished: Jan 5, 2026, 8:57:14 PM
dateUpdated: Oct 8, 2026, 3:21:41 PM
1 related source bulletins · separate from aliases
WID-SEC-W-2026-0328: IBM App Connect Enterprise Certified Container: Mehrere Schwachstellen
CVE-2025-13491 · CVE-2025-61727 · CVE-2025-61729 · CVE-2026-0621 · CVE-2026-21226 · CVE-2026-22817 · CVE-2026-22818
- Source published
- Jan 5, 2026, 8:57:14 PM (timezone not stated)
- Source modified
- Oct 8, 2026, 3:21:41 PM (timezone not stated)
- Observed here
- 1 Nov 2026 01:20:23 UTC
- Source terms
- ENISA EUVD · source terms and attribution apply
Original source record · Cite this exact observation · Complete original publisher JSON
This view projects the publisher's source fields for reading; the original JSON retains additional fields and CVE enrichment containers. Attribution: euvd · ENISA EUVD · source terms and attribution apply. Source text is retained; field grouping and change labels are provided by ChangeIntel.
EUVD CVSS 4.0 · 8.7 CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N