CVE-2026-44283Network attack vector

Authenticated RBAC bypass via unchecked transaction Put options

Published May 14, 2026 · Updated May 14, 2026

Incorrect authorization in affected etcd releases allows remote authenticated users to read restricted data or attach unauthorized leases. The transaction authorization path omitted checkPutAuth checks for PrevKv and Lease, allowing those options to return a prior value or bind a lease outside the account's permissions. Exploitation requires direct etcd access, built-in RBAC, and a restricted account; typical Kubernetes deployments do not use this authorization path.

CVSS severity4.3
Medium
EPSS probability0.22%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
Coverage for this vulnerability

See if you're affected

Explore vulnerability checks for your environment with Hinoki.

Book a demo

Summary

What happened

Incorrect authorization in affected etcd releases allows remote authenticated users to read restricted data or attach unauthorized leases. The transaction authorization path omitted checkPutAuth checks for PrevKv and Lease, allowing those options to return a prior value or bind a lease outside the account's permissions. Exploitation requires direct etcd access, built-in RBAC, and a restricted account; typical Kubernetes deployments do not use this authorization path.

The record

CVE
CVE-2026-44283
Published
May 14, 2026
Updated
May 14, 2026
Vendor
etcd-io
Product
etcd
Classifications
CWE-863, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. May 14, 2026CVE publishedPublication date reported by the CVE source.
  2. May 14, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

Compare your product and version with the public record. A matching version still requires validation against your environment.

Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 3.4.44
  2. Affected versionversion=>= 3.5.0, <= 3.5.29
  3. Affected versionversion=>= 3.6.0, <= 3.6.10

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

etcd-io · etcdversion=< 3.4.44; version=>= 3.5.0, <= 3.5.29; version=>= 3.6.0, <= 3.6.10

Published CVSS scores

4.3NIST NVDCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
0.0GitHub, Inc.CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-863Incorrect Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

See the directory against your own environment.

Your stack

Check the software in your environment

Book a demo to see how Hinoki identifies affected software and validates exploitability in your environment.

Book a demo