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CVE-2026-42239

Budibase is an open-source low-code platform. Prior to version 3.35.10, the budibase:auth cookie containing the JWT session token is set with httpOnly: false at packages/backend-core/src/utils/utils.ts:218. JavaScript can read this cookie via document.cookie. This means every XSS becomes a full account takeover — the attacker steals the JWT and has persistent access to the victim's account. The cookie also lacks secure: true (sent over plaintext HTTP) and sameSite attribute. This issue has been
Lifecycle PUBLISHED1 preserved revisionFact urn:baitaphish:canonical-cve-fact-revision:v2:4433c2d12845a61b51a4564d8d1652102dfa9e2b7e06f27c480c6cbb7c896c2d
Known exploited
Not asserted
Disputed
No
Stale source
No
Conflicts
0

Affected products and versions

1 source assertion
{"product":"budibase","vendor":"Budibase","versions":[{"status":"affected","version":"< 3.35.10"}]}
  • cve_program_cvelist_v5affected
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /containers/cna/affected/0

Provider-owned CVSS observations

1 source assertion
{"metric":{"attackComplexity":"LOW","attackVector":"NETWORK","availabilityImpact":"NONE","baseScore":8.1,"baseSeverity":"HIGH","confidentialityImpact":"HIGH","integrityImpact":"HIGH","privilegesRequired":"HIGH","scope":"CHANGED","userInteraction":"REQUIRED","vectorString":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:N","version":"3.1"},"metric_type":"cvssV3_1"}
  • cve_program_cvelist_v5cvss
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /containers/cna/metrics/0/cvssV3_1

CWE assertions

1 source assertion
{"cweId":"CWE-1004","description":"CWE-1004: Sensitive Cookie Without 'HttpOnly' Flag","lang":"en","type":"CWE"}
  • cve_program_cvelist_v5cwe
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /containers/cna/problemTypes/0/descriptions/0

Source references

3 source assertions
{"name":"https://github.com/Budibase/budibase/releases/tag/3.35.10","tags":["x_refsource_MISC"],"url":"https://github.com/Budibase/budibase/releases/tag/3.35.10"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /containers/cna/references/1
{"tags":["exploit"],"url":"https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /containers/adp/0/references/0
{"name":"https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r","tags":["x_refsource_CONFIRM"],"url":"https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r"}
  • cve_program_cvelist_v5reference
    urn:baitaphish:normalized-source-record:v2:1fa379fab1195c4f03ec026e0c9beaa010f89b274a769a425c5d614c43aa222a · sha256:547b204e1076e692… · /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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