Is better-auth affected by CVE-2026-45364?

npm better-auth is affected in =1.5.0-beta.1 <1.5.0-beta.9.

Is CVE-2026-45364 being exploited?

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

high

CVE-2026-45364

Q: Is CVE-2026-45364 being exploited?

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

npm · better-auth

Summary

Better Auth: Rate limiter keys IPv6 addresses individually and is bypassable via prefix rotation

Severity: high
EPSS: 0.3% (p21)
Also known as: GHSA-p6v2-xcpg-h6xw
Published: 2026-05-15

References

https://github.com/better-auth/better-auth/security/advisories/GHSA-p6v2-xcpg-h6xw
https://nvd.nist.gov/vuln/detail/CVE-2026-45364
https://github.com/better-auth/better-auth/pull/7470

Related advisories

GHSA-xg6x-h9c9-2m83 — critical · npm/better-auth
CVE-2026-45337 — high · npm/better-auth
GHSA-wxw3-q3m9-c3jr — medium · npm/better-auth

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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.