CVE-2026-82470: Rodauth before 2.47.0 TOTP Code Reuse via Drift Window

Severity: medium (CVSS 5.4 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.4% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-08-29 · updated 2026-09-11
Weakness: CWE-294

Description

Rodauth before 2.47.0 contains a time-based one-time password reuse vulnerability in the otp feature that fails to track the last accepted code timestamp. Attackers who observe a valid TOTP code can replay it during the drift window to bypass the second authentication factor.

Affected products

jeremyevans rodauth: before 2.47.0 — fixed in 2.47.0

How to fix

Upgrade to a fixed version: jeremyevans rodauth 2.47.0. Check the vendor advisory for mitigations.

References

https://github.com/jeremyevans/rodauth
https://github.com/jeremyevans/rodauth/commit/3bfd0a11bae70935b1944e71dbe787dd0c3a62ad
https://github.com/jeremyevans/rodauth/security/advisories/GHSA-hhvg-6qmv-58vc
https://www.vulncheck.com/advisories/rodauth-before-2.47.0-totp-code-reuse-via-drift-window

Get alerted when CVE-2026-82470 or the next vulnerability affects your stack