Predictive Vulnerability Intelligence.

Product

  • Product
  • Pricing
  • Documentation

Company

  • About
  • Partnerships
  • Blog
  • Support

Legal

  • Terms
  • Privacy
  • Data Licensing

© 2026 FAUCET Technologies LLC. All rights reserved.

CVE-2026-44283

20
FAUCET Score

etcd is a distributed key-value store for the data of a distributed system. Prior to 3.4.44, 3.5.30, and 3.6.11, a vulnerability in etcd allows read access via PrevKv, or lease attachment in Put requests within transaction operations, to bypass RBAC authorization checks. An authenticated user without sufficient read or lease-related permissions may be able to access unauthorized data or attach leases by invoking transaction operations with these features enabled. This vulnerability is fixed in 3.4.44, 3.5.30, and 3.6.11.

First published: May 14, 2026Last modified: May 14, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 3.4.44CPE matchmatch criteria
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*
>= 3.5.0, < 3.5.30CPE matchmatch criteria
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*
>= 3.6.0, < 3.6.11CPE matchmatch criteria
cpe:2.3:a:etcd:etcd:*:*:*:*:*:*:*:*

CVSS Data

CVSS version used by this source: 3.1

0.0NONE

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:N

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
NONE
Exploitability Score
3.9
Impact Score
0.0
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.22%
Probability of exploitation in next 30 days
EPSS Percentile
13.2%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0022 is in the 14th percentile among its peer group of 21,958 CVEs.

Social Chatter

The average CVE in this peer group has 0.0 Twitter, 0.0 Reddit, 0.1 Bluesky, 0.0 Mastodon, and 0.1 GitHub mentions.

Media Mentions

No media coverage found for this CVE.

The average CVE in this peer group has 0.0 InfoSec Media, 0.0 Vendor Blog, and 0.0 Security Researcher mentions.

Remediation

Patch Available

Vendor Patches (7)

gopatch availablevia ghsa
Product: go.etcd.io/etcd/v3Fixed in: 3.5.30
gopatch availablevia ghsa
Product: go.etcd.io/etcdFixed in: 3.4.44
gopatch availablevia ghsa
Product: go.etcd.io/etcd/v3Fixed in: 3.6.11
microsoftpatch availablevia msrc
Product: azl3 etcd 3.5.28-1 on Azure Linux 3.0Fixed in: 3.5.30-2
microsoftpatch availablevia msrc
Product: 21182-17084Fixed in: 3.5.30-1
microsoftpatch availablevia msrc
Product: 21182-17084Fixed in: 3.5.30-2
github_advisoryworkaround availablevia nvd_reference
View patch

Vendor Advisories (2)

microsoft2026-May/CVE-2026-44283Moderate

etcd: Read access via PrevKv in etcd transactions may bypass RBAC authorization checks

May 12, 2026
goGHSA-x35m-3gp4-4fh5low

etcd RBAC bypass allows unauthorized data access via PrevKv/lease attachment in nested transaction Put requests

May 7, 2026

References

github.com / etcd-io/etcd/security/advisories/GHSA-x35m-3gp4-4fh5
MitigationVendor Advisory