Machine-written summary
Summary written by Claude Haiku from the source advisory. Not reviewed by a person.
Vault (github.com/hashicorp/vault) versions before 1.16.0 are affected: the TLS certificates auth method did not correctly validate OCSP responses when one or more OCSP sources were configured. The source does not describe what an attacker needs or what they could do with this flaw. Upgrade to Vault 1.16.0 or later; Vault Enterprise users should move to 1.16.1, 1.15.7, or 1.14.11.
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 |
|---|---|---|---|---|
| 6.4 | Medium | 3.1 | CVSS:3.1/AV:A/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H | CNA (HashiCorp) |
- CISA KEV Not listed.
- EPSS 0.0030, the 23rd percentile, on 5 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.
Timeline
- 31 Oct 2026, 14:15 UTC First seen by agentprime
- 31 Oct 2026, 14:15 UTC Confirmed by OSV