CVE-2026-73499etcd: Watch API authorization bypass via open-ended range requests
Updated under an hour ago ()
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It affects etcd-io etcd. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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etcd is a distributed key-value store for the data of a distributed system. Prior to versions 3.5.33, 3.6.14, and 3.7.1, a user granted READ permission on a single exact key can use the Watch gRPC API with clientv3.WithFromKey() to receive watch events for every key lexicographically greater than or equal to the permitted key. In server/etcdserver/api/v3rpc/watch.go, the open-ended RangeEnd sentinel is rewritten before the RBAC permission check in server/auth/range_perm_cache.go function isRangeOpPermitted, causing the request to be treated as an exact-key watch. Range/Get and DeleteRange requests are not affected, and the issue affects only clusters with authentication enabled. This issue is fixed in versions 3.5.33, 3.6.14, and 3.7.1.
- CVSS
- 7.1 HIGH (v4.0, CNA)CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N
- Weakness (CWE)
- CWE-863
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Aug 14, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
etcd-io etcd etcd_io:etcd (from the name) | before 3.5.33; from 3.6.0, < 3.6.14; from 3.7.0-alpha.0, < 3.7.1 | CNA record |
References
- https://github.com/etcd-io/etcd/security/advisories/GHSA-xg4h-6gfc-h4m8x-refsource-confirm
- https://github.com/etcd-io/etcd/commit/6643f80602461a6095c9b294b6512fd9719bef41x-refsource-misc
- https://github.com/etcd-io/etcd/commit/7cf71ec9e2ec54230a5454392fa4ffd4574b41edx-refsource-misc
- https://github.com/etcd-io/etcd/commit/afeaa624da19085b47fb5ccc7c22a8c421bc2eaex-refsource-misc
- https://github.com/etcd-io/etcd/commit/e863b001bbf3367003a543aa3099db9892134cd7x-refsource-misc
- https://github.com/etcd-io/etcd/releases/tag/v3.5.33x-refsource-misc
- https://github.com/etcd-io/etcd/releases/tag/v3.6.14x-refsource-misc
- https://github.com/etcd-io/etcd/releases/tag/v3.7.1x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.