Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Hashicorp Vault versions before 1.20.1 are affected. The TOTP Secrets Engine code validation endpoint allows a TOTP code to be reused within its validity period, so a party who has observed a valid code could submit it again and have it accepted. The source gives few details about the required access. Upgrade to Vault 1.20.1 or later; Vault Enterprise 1.19.7, 1.18.12, and 1.16.23 also include the fix.
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
| Score | Rating | CVSS | Vector | Source |
|---|---|---|---|---|
| 6.5 | Medium | 3.1 | CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N | CNA (HashiCorp) |
- CISA KEV Not listed.
- EPSS 0.0045, the 39th percentile, on 6 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:14 UTC First seen by agentprime
- 31 Oct 2026, 14:14 UTC Confirmed by OSV