Incorrect Authorization Affecting go.etcd.io/etcd/v3/server/etcdserver/txn package, versions <3.4.42>=3.5.0-alpha.0 <3.5.28>=3.6.0-alpha.0 <3.6.9
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-GOLANG-GOETCDIOETCDV3SERVERETCDSERVERTXN-15762272
- published24 Mar 2026
- disclosed20 Mar 2026
- creditLuke Francis, Battulga Byambaa
Introduced: 20 Mar 2026
CVE-2026-33343 Â (opens in a new tab)How to fix?
Upgrade go.etcd.io/etcd/v3/server/etcdserver/txn to version 3.4.42, 3.5.28, 3.6.9 or higher.
Overview
Affected versions of this package are vulnerable to Incorrect Authorization in the CheckTxnAuth() function. A user with RBAC restricted permissions on key ranges can gain unauthorized access to the entire data store by bypassing key-level authorization checks using nested transactions.