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CVE-2026-63428

HeyForm is an open-source form builder. Prior to version 3.0.0-rc.9, `completeSubmission` accepts a `hiddenFields: [{id, name, value}]` array from the submitter and stores it verbatim in `submission.hiddenFields`, without validating the supplied `id`/`name` against the form's declared `form.hiddenFields` schema. An anonymous form submitter can therefore inject arbitrary key/value pairs (including XSS payloads, fake authorization metadata, integration-relevant values) into the stored submission.
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:e77648587ffddaad3e46b06f3d8825d43ffefad36d47d6235c6780a961638c97
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-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/problemTypes/1/descriptions/0

{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}

  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/problemTypes/0/descriptions/0

Affected products and versions

1 source assertion
{"product":"heyform","vendor":"heyform","versions":[{"status":"affected","version":"< 3.0.0-rc.9"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":5.8,"baseSeverity":"MEDIUM","confidentialityImpact":"NONE","integrityImpact":"LOW","privilegesRequired":"NONE","scope":"CHANGED","userInteraction":"NONE","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:N/I:L/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

2 source assertions
{"cweId":"CWE-915","description":"CWE-915: Improperly Controlled Modification of Dynamically-Determined Object Attributes","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/problemTypes/1/descriptions/0
{"cweId":"CWE-20","description":"CWE-20: Improper Input Validation","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/heyform/heyform/commit/092e255e9e02565de1b3c057f3dad849160952d2","tags":["x_refsource_MISC"],"url":"https://github.com/heyform/heyform/commit/092e255e9e02565de1b3c057f3dad849160952d2"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/references/1
{"name":"https://github.com/heyform/heyform/security/advisories/GHSA-r7vg-xh87-v4w3","tags":["x_refsource_CONFIRM"],"url":"https://github.com/heyform/heyform/security/advisories/GHSA-r7vg-xh87-v4w3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /containers/cna/references/0
{"tags":["exploit"],"url":"https://github.com/heyform/heyform/security/advisories/GHSA-r7vg-xh87-v4w3"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:85ee87e390feb6de1ee1ed21f90f4ef8c61269681ecbe14afc730b8d3a75f1e0 · sha256:8e753b6910eb8a80… · /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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