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CVE-2026-23528

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
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:80a44e5c6aca46cc0aa4a4b04a8d108d10e826946afa3ed036c5d8ec3feee26a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 3 assertions

{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/2/descriptions/0

{"cweId":"CWE-250","description":"CWE-250: Execution with Unnecessary Privileges","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"distributed","vendor":"dask","versions":[{"status":"affected","version":"< 2026.1.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackRequirements":"NONE","attackVector":"NETWORK","baseScore":5.3,"baseSeverity":"MEDIUM","privilegesRequired":"NONE","subAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","userInteraction":"PASSIVE","vectorString":"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","version":"4.0","vulnAvailabilityImpact":"NONE","vulnConfidentialityImpact":"LOW","vulnIntegrityImpact":"LOW"},"metric_type":"cvssV4_0"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/metrics/0/cvssV4_0

CWE assertions

3 source assertions
{"cweId":"CWE-79","description":"CWE-79: Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/2/descriptions/0
{"cweId":"CWE-250","description":"CWE-250: Execution with Unnecessary Privileges","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-80","description":"CWE-80: Improper Neutralization of Script-Related HTML Tags in a Web Page (Basic XSS)","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/problemTypes/0/descriptions/0

Source references

2 source assertions
{"name":"https://github.com/dask/distributed/commit/ab72092a8a938923c2bb51a2cd14ca26614827fa","tags":["x_refsource_MISC"],"url":"https://github.com/dask/distributed/commit/ab72092a8a938923c2bb51a2cd14ca26614827fa"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/references/1
{"name":"https://github.com/dask/distributed/security/advisories/GHSA-c336-7962-wfj2","tags":["x_refsource_CONFIRM"],"url":"https://github.com/dask/distributed/security/advisories/GHSA-c336-7962-wfj2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:d37b48d60601a8e23acba7611fbeab947c6b87515a16499a0badd3a260d288cd · sha256:e55dc641ba117693… · /containers/cna/references/0

Attribution and limitations

  • CVE Program CVEList V5: Reproduce the MITRE copyright designation and CVE license in copies. Source →

Provider severity values are preserved separately. Baitaphish does not convert them into a risk rating, infer affected products, or treat EPSS as observed exploitation.

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