Improper one time password handling in devise-two-factor

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

• CISA KEV Not listed.
• EPSS 0.0088, the 59th percentile, on 7 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

1. 31 Oct 2026, 15:16 UTC First seen by agentprime
2. 31 Oct 2026, 15:16 UTC Confirmed by OSV

Sources

• GitHub Advisory Database: GHSA-jm35-h8q2-73mp
• OSV: GHSA-jm35-h8q2-73mp
• github.com/tinfoil/devise-two-factor/security/advisories/GHSA-jm35-h8q2-73mp
• nvd.nist.gov/vuln/detail/CVE-2021-43177
• github.com/tinfoil/devise-two-factor/issues/106
• github.com/rubysec/ruby-advisory-db/blob/master/gems/devise-two-factor/CVE-2021-43177.yml
• github.com/tinfoil/devise-two-factor

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.