# CVE-2026-105816 — HashiCorp Vault

> As of 2026-10-08, CVE-2026-105816 is a HIGH-severity vulnerability in HashiCorp Vault, CVSS v3.1 8, EPSS 0.3% (24.7th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-105816 as of 2026-10-08; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-10-08

## What is CVE-2026-105816?

Vault and Vault Enterprise did not consistently verify that stored plugin catalog entries reference binaries within the configured plugin directory. When Vault uses Shamir seals and has an external plugin directory configured, a privileged operator able to restore an Integrated Storage (Raft) snapshot may be able to execute arbitrary code on the Vault host. This vulnerability (CVE-2026-105816) is fixed in Vault Community Edition 2.1.2, and Vault Enterprise 2.1.2, 1.21.12, 1.20.17, and 1.19.23.

The record classifies CVE-2026-105816 under weakness class [CWE-22](https://intel.threadlinqs.com/cwe/CWE-22). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs high-privilege credentials, needs no user interaction, and has high impact on confidentiality, integrity, availability. 2 affected-product entries are recorded, across 1 vendor, listed below. The identifier was first published 3 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 8 — HIGH (`CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:C/C:H/I:H/A:H`)
- **EPSS (FIRST):** 0.3% probability of exploitation in the next 30 days, higher than 24.7% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 5/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-10-07, last modified 2026-10-08

## Is CVE-2026-105816 being exploited?

It currently carries a trending score of 36 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [HashiCorp](https://intel.threadlinqs.com/vendors/hashicorp): Vault, Vault Enterprise

## How to fix CVE-2026-105816

No vendor patch reference has been recorded for CVE-2026-105816 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-105816

No threat campaign in the Threadlinqs corpus currently references CVE-2026-105816, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-08.

**Other references**

- [discuss.hashicorp.com](https://discuss.hashicorp.com/t/hcsec-2026-41-vault-vulnerable-to-arbitrary-code-execution-via-plugin-catalog-entries-restored-from-raft-snapshots/77813)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-105816
Full detection coverage and IOCs for threats exploiting CVE-2026-105816 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp