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CVE-2026-42615

GCHQ CyberChef before 11.0.0 allows XSS via Show Base64 offsets, as demonstrated by the /#recipe=Show_Base64_offsets('%3Cscript substring.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:f6eeab8353abb9ea79b8e4bede28fd7b661faff1eb6d90d98fa0a38da978cd5a
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"defaultStatus":"unaffected","product":"CyberChef","vendor":"GCHQ","versions":[{"lessThan":"11.0.0","status":"affected","version":"0","versionType":"semver"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":7.2,"baseSeverity":"HIGH","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-79","description":"CWE-79 Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/problemTypes/0/descriptions/0

Source references

4 source assertions
{"url":"https://github.com/gchq/CyberChef/commit/9641ae07f92e9af50f10e978385465b2f4a36c4d"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/references/1
{"url":"https://github.com/gchq/CyberChef/compare/v10.24.0...v11.0.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/references/2
{"url":"https://github.com/gchq/CyberChef/issues/2344"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/references/0
{"url":"https://github.com/gchq/CyberChef/pull/2346"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:e8ea6eb92d74fb4e9d66206714087b852f9f6bee23939623c6dab77aca67a86c · sha256:c9b1d0f76bb9d954… · /containers/cna/references/3

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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