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CVE-2026-39833

Invoking key constraints not enforced in golang.org/x/crypto/ssh/agent

Published: May 22, 2026Updated: Jul 23, 2026 Sources: CVE List NVDCWE-862
9.1CRITICAL
NVD MITRE
EPSS Score
0.4%
Top 66.0%
CISA KEV
Not in KEV
Exploits
No Known Exploits
Remediation
Patch Available
Self-Check
OpenVAS

Description

The in-memory keyring returned by NewKeyring() silently accepted keys with the ConfirmBeforeUse constraint but never enforced it. The key would sign without any confirmation prompt, with no indication to the caller that the constraint was not in effect. NewKeyring() now returns an error when unsupported constraints are requested.

No summary for this CVE yet.

CVSS Vector Breakdown

AV:NAC:LPR:NUI:NS:UC:HI:HA:N
Exploitability
AV:NAttack Vector
Network
AC:LAttack Complexity
Low
PR:NPrivileges Required
None
UI:NUser Interaction
None
Scope
S:UScope
Unchanged
Impact
C:HConfidentiality
High
I:HIntegrity
High
A:NAvailability
None
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Weaknesses

CWE-862

Affected Products

golang
oss-project·US
crypto
OSS Libraries
golang.org/x/crypto
oss-projectaka x/crypto, golang x crypto
golang.org/x/crypto/ssh/agentLibrary
OSS Libraries / go

Exploitability

Official Patch Available
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Attack Graph

Products CVE Techniques Tactics

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MITRE ATT&CK

2 techniques
Initial Access
View detailed technique mapping

References

https://go.dev/cl/778640
go.dev
https://go.dev/cl/778641
go.dev
https://go.dev/issue/79436
go.dev
and 2 more references View all →

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