Vulnerability · Published Aug 29, 2026 · Assigned by VulnCheck
CVE-2026-82470Rodauth before 2.47.0 TOTP Code Reuse via Drift Window
Medium 5.4
In plain English
A medium-severity security flaw in rodauth from jeremyevans. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 35% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Severity (CVSS 3.1)5.4Medium
Exploit odds (30 days)0.4%top 64.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: none
Attack toolingNoneno public tooling known
Official 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 packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:14 | ruby-rodauth | 2.47.0-1 | DEBIAN-CVE-2026-82470 |
| Ubuntu:26.10 | ruby-rodauth | no fix listed | UBUNTU-CVE-2026-82470 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| jeremyevans | rodauth | 0 – before 2.47.0 |
Weakness: CWE-294 · Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:N
References
- Patch Commit patch
- GitHub Security Advisory (GHSA-hhvg-6qmv-58vc) vendor-advisory
- https://github.com/jeremyevans/rodauth product
- VulnCheck Advisory: Rodauth before 2.47.0 TOTP Code Reuse via Drift Window third-party-advisory