# CVE-2026-115517: Unrestricted network access between execution contexts in KNIME Business Hub

Status: published. Published: 2026-10-22. Updated: 2026-11-02.

Unrestricted network access between execution contexts in KNIME Business Hub before version 1.19.0 allows an authenticated remote user to access open network ports on executors in different execution contexts. This only poses a security issue if the IP address of the attacked executor is know and there are open network ports that provided access without further authentication. By default no network ports are open. However, depending on the running workflows, ports may be opened and provide an attack surface. As a workaround, network policies can be created manually.

## Remediation

No remediation reported in collected sources

## Affected products and versions

- KNIME / KNIME Business Hub: ≥ 0; < 1.19.0 (affected, semver); 1.19.0 (unaffected, semver). Source: CNA: KNIME

## Severity and prioritization

- CVSS 4.0: 6.4 (medium); CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:L/SI:H/SA:H; source: CNA: KNIME

- CISA KEV: No listing in collected sources

- EPSS: 0.43% as of 2026-11-01; percentile 37.30%

- SSVC: exploitation none; automatable no; technical impact partial; source ADP: CISA-ADP

- Weaknesses: CWE-653

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://www.knime.com/security/advisories (CNA: KNIME)

## Provenance

- CNA: KNIME: https://www.cve.org/CVERecord?id=CVE-2026-115517; retrieved 2026-11-02; source updated 2026-11-02

- FIRST EPSS: https://api.first.org/data/v1/epss?cve=CVE-2026-115517; retrieved 2026-11-02; source updated Not reported

Revision: 6ee0d4b4c284a276f1482bc8fc5cf46c9c6b557957af53d3970887f1b8bcbf3f

Canonical: https://y2.dev/cve/CVE-2026-115517