Is @budibase/backend-core affected by CVE-2026-42239?

npm @budibase/backend-core is affected in <3.35.10.

Is CVE-2026-42239 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

high

CVE-2026-42239

Q: Is CVE-2026-42239 being exploited?

Not on the CISA KEV list. EPSS exploit probability is 0.3%.

npm · @budibase/backend-core

Summary

Budibase auth session cookies are set with httpOnly:false — any XSS can lead to full account takeover

Severity: high
EPSS: 0.3% (p20)
Also known as: GHSA-4f9j-vr4p-642r
Published: 2026-04-24

References

https://github.com/Budibase/budibase/security/advisories/GHSA-4f9j-vr4p-642r
https://nvd.nist.gov/vuln/detail/CVE-2026-42239
https://github.com/Budibase/budibase

Related advisories

CVE-2026-41428 — critical · npm/@budibase/backend-core
CVE-2026-31818 — critical · npm/@budibase/backend-core
CVE-2026-48147 — medium · npm/@budibase/backend-core
CVE-2026-46424 — medium · npm/@budibase/backend-core

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Sources: CISA KEV (public domain), OSV.dev & GitHub Advisory Database (CC-BY-4.0), FIRST EPSS, NVD/CWE (public domain). Served live from the Stateward advisory database.