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CVE-2026-39827

34
FAUCET Score

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

First published: May 22, 2026Last modified: May 22, 2026

Impacted Technologies

VendorProductVersion(s)CPE
< 0.52.0CPE matchmatch criteria
cpe:2.3:a:golang:crypto:*:*:*:*:*:go:*:*

CVSS Data

CVSS version used by this source: 3.1

6.5MEDIUM

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

Attack Vector
NETWORK
Attack Complexity
LOW
Privileges Required
LOW
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
NONE
Integrity Impact
NONE
Availability Impact
HIGH
Exploitability Score
2.8
Impact Score
3.6
CvssVersion
3.1

Exploit Intelligence

EPSS Score
0.28%
Probability of exploitation in next 30 days
EPSS Percentile
20.1%
Percentile rank of EPSS score among Peer Group
As of 2026-07-27
Model: v2026.06.15
This CVE's current EPSS score of 0.0028 is in the 25th 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

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 (34)

gopatch availablevia ghsa
Product: golang.org/x/cryptoFixed in: 0.52.0
microsoftpatch availablevia msrc
Product: 21418-17084Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: 21409-17084Fixed in: 2.27.0-12
microsoftpatch availablevia msrc
Product: azl3 moby-engine 25.0.3-17 on Azure Linux 3.0Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: azl3 cert-manager 1.12.15-6 on Azure Linux 3.0Fixed in: 1.12.15-8
microsoftpatch availablevia msrc
Product: azl3 kubernetes 1.30.10-23 on Azure Linux 3.0Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: azl3 kubernetes 1.30.10-25 on Azure Linux 3.0Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: azl3 kubevirt 1.7.1-2 on Azure Linux 3.0Fixed in: 1.7.1-5
microsoftpatch availablevia msrc
Product: azl3 moby-engine 25.0.3-18 on Azure Linux 3.0Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: azl3 packer 1.9.5-13 on Azure Linux 3.0Fixed in: 1.9.5-14
microsoftpatch availablevia msrc
Product: azl3 docker-compose 2.27.0-11 on Azure Linux 3.0Fixed in: 2.27.0-13
microsoftpatch availablevia msrc
Product: azl3 telegraf 1.31.0-23 on Azure Linux 3.0Fixed in: 1.31.0-23
microsoftpatch availablevia msrc
Product: azl3 telegraf 1.31.0-22 on Azure Linux 3.0Fixed in: 1.31.0-23
microsoftpatch availablevia msrc
Product: azl3 cf-cli 8.7.11-6 on Azure Linux 3.0Fixed in: 8.7.11-7
microsoftpatch availablevia msrc
Product: azl3 cf-cli 8.7.11-7 on Azure Linux 3.0Fixed in: 8.7.11-7
microsoftpatch availablevia msrc
Product: azl3 docker-buildx 0.14.0-13 on Azure Linux 3.0Fixed in: 0.14.0-15
microsoftpatch availablevia msrc
Product: azl3 gh 2.62.0-16 on Azure Linux 3.0Fixed in: 2.62.0-17
microsoftpatch availablevia msrc
Product: azl3 gh 2.62.0-17 on Azure Linux 3.0Fixed in: 2.62.0-17
microsoftpatch availablevia msrc
Product: azl3 gh 2.62.0-18 on Azure Linux 3.0Fixed in: 2.62.0-17
microsoftpatch availablevia msrc
Product: 20984-17084Fixed in: 1.12.15-8
microsoftpatch availablevia msrc
Product: 21256-17084Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: 21299-17084Fixed in: 1.7.1-5
microsoftpatch availablevia msrc
Product: 21274-17084Fixed in: 25.0.3-18
microsoftpatch availablevia msrc
Product: 20966-17084Fixed in: 1.9.5-14
microsoftpatch availablevia msrc
Product: 21409-17084Fixed in: 2.27.0-13
microsoftpatch availablevia msrc
Product: 21481-17084Fixed in: 1.31.0-23
microsoftpatch availablevia msrc
Product: 21395-17084Fixed in: 1.31.0-23
microsoftpatch availablevia msrc
Product: 21402-17084Fixed in: 8.7.11-7
microsoftpatch availablevia msrc
Product: 21505-17084Fixed in: 8.7.11-7
microsoftpatch availablevia msrc
Product: 21408-17084Fixed in: 0.14.0-15
microsoftpatch availablevia msrc
Product: 21399-17084Fixed in: 2.62.0-17
microsoftpatch availablevia msrc
Product: 21503-17084Fixed in: 2.62.0-17
microsoftpatch availablevia msrc
Product: 21378-17084Fixed in: 1.30.10-25
microsoftpatch availablevia msrc
Product: 21555-17084Fixed in: 2.62.0-17

Vendor Advisories (2)

goGHSA-qpw4-5x99-6vjpmedium

golang.org/x/crypto: Invoking memory leak when rejecting channels can lead to DoS

Jun 25, 2026
microsoft2026-May/CVE-2026-39827Moderate

Invoking memory leak when rejecting channels can lead to DoS in golang.org/x/crypto/ssh

May 12, 2026

References

go.dev / cl/781320
Issue Tracking
go.dev / issue/35127
Issue Tracking
groups.google.com / g/golang-announce/c/a082jnz-LvI
Mailing List
pkg.go.dev / vuln/GO-2026-5016
Vendor Advisory