{"cve":"CVE-2026-23528","nvd":{"published":"2026-01-16T17:15:54.640","modified":"2026-06-17T10:21:43.960","status":"Analyzed","description":"Dask distributed is a distributed task scheduler for Dask. Prior to 2026.1.0, when Jupyter Lab, jupyter-server-proxy, and Dask distributed are all run together, it is possible to craft a URL which will result in code being executed by Jupyter due to a cross-side-scripting (XSS) bug in the Dask dashboard. It is possible for attackers to craft a phishing URL that assumes Jupyter Lab and Dask may be running on localhost and using default ports. If a user clicks on the malicious link it will open an error page in the Dask Dashboard via the Jupyter Lab proxy which will cause code to be executed by the default Jupyter Python kernel. This vulnerability is fixed in 2026.1.0.","cvss_v4":{"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N","score":5.3},"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1},"cwes":["CWE-79","CWE-80","CWE-250"],"references":["https://github.com/dask/distributed/commit/ab72092a8a938923c2bb51a2cd14ca26614827fa","https://github.com/dask/distributed/security/advisories/GHSA-c336-7962-wfj2"],"products":["anaconda:dask"],"source":"nvd","synced_at":"2026-10-19T22:21:16.563232421+00:00"},"epss":{"cve":"CVE-2026-23528","score":0.00233,"percentile":0.14259,"date":"2026-10-31"},"kev":null,"osv":[{"id":"GHSA-c336-7962-wfj2","url":"https://osv.dev/vulnerability/GHSA-c336-7962-wfj2","summary":"Dask Distributed is Vulnerable to Remote Code Execution via Jupyter Proxy and Dashboard","modified":"2026-09-10T03:50:58.974469125Z","packages":[{"ecosystem":"PyPI","name":"distributed","purl":"pkg:pypi/distributed","ranges":["<2026.1.0"],"fixed":["2026.1.0"]}]},{"id":"PYSEC-2026-169","url":"https://osv.dev/vulnerability/PYSEC-2026-169","summary":"","modified":"2026-05-30T18:45:05.726805491Z","packages":[{"ecosystem":"PyPI","name":"distributed","purl":"pkg:pypi/distributed","ranges":["<2026.1.0"],"fixed":["2026.1.0"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}