Bug 2494451

Summary: CVE-2026-39833 pack: golang.org/x/crypto/ssh/agent: Security bypass due to unenforced key confirmation [fedora-all]
Product: [Fedora] Fedora Reporter: jkelly <jkelly>
Component: packAssignee: Lokesh Mandvekar <lsm5>
Status: NEW --- QA Contact:
Severity: medium Docs Contact:
Priority: medium    
Version: rawhideCC: go-sig, jnovy, lsm5
Target Milestone: ---Keywords: Security, SecurityTracking
Target Release: ---   
Hardware: Unspecified   
OS: Unspecified   
Whiteboard: {"flaws": ["28ae1c3c-f791-4399-96eb-f6f0b2d222a4"]}
Fixed In Version: Doc Type: ---
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Documentation: --- CRM:
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oVirt Team: --- RHEL 7.3 requirements from Atomic Host:
Cloudforms Team: --- Target Upstream Version:
Embargoed:
Bug Depends On:    
Bug Blocks: 2480683    

Description jkelly 2026-06-29 15:36:08 UTC 
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.

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.