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CVE-2026-57439

CyberChef is a web app for encryption, encoding, compression, and data analysis. Prior to 11.2.0, the Series Chart operation accepts __proto__ as a key while parsing user-supplied CSV, allowing prototype pollution that can be chained with operations such as Parse UDP to inject malicious JavaScript into HTML output. This issue is fixed in version 11.2.0.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:75f9d22031cc094d1676976e04dd31b1f056f0922f7780210b79e3ff6da2ac97
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
1

Preserved source conflicts

No provider value was silently selected as the winner.

cwe · 2 assertions

{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/problemTypes/1/descriptions/0

{"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:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"CyberChef","vendor":"gchq","versions":[{"status":"affected","version":"< 11.2.0"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"LOCAL","availabilityImpact":"NONE","baseScore":5,"baseSeverity":"MEDIUM","confidentialityImpact":"LOW","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:L/AC:L/PR:N/UI:R/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:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-1321","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/problemTypes/1/descriptions/0
{"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:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/problemTypes/0/descriptions/0

Source references

6 source assertions
{"name":"https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/commit/85db3be5d0096859b810f0e8d3e151d5dc9b948f"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/references/3
{"name":"https://github.com/gchq/CyberChef/issues/2568","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/issues/2568"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/references/1
{"name":"https://github.com/gchq/CyberChef/pull/2569","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/pull/2569"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/references/2
{"name":"https://github.com/gchq/CyberChef/releases/tag/v11.2.0","tags":["x_refsource_MISC"],"url":"https://github.com/gchq/CyberChef/releases/tag/v11.2.0"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/references/4
{"name":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c","tags":["x_refsource_CONFIRM"],"url":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/gchq/CyberChef/security/advisories/GHSA-fx6f-382r-j72c"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:f23a405b46eb001614128cdbc8e27e0de9a734cdade3a59c5859ff530b59601c · sha256:5b67a6c6b0b1b89b… · /containers/adp/0/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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