CVE-2026-39828: CWE-863: Incorrect Authorization in golang.org/x/crypto golang.org/x/crypto/ssh
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
AI Analysis
Technical Summary
The vulnerability in golang.org/x/crypto/ssh involves incorrect authorization handling (CWE-863). When an SSH server authentication callback returned PartialSuccessError along with non-nil Permissions, the permissions were discarded silently, potentially allowing unauthorized command execution by ignoring certificate restrictions. The fix changes this behavior so that returning non-nil Permissions with PartialSuccessError now causes a connection error, preventing the bypass of restrictions.
Potential Impact
This vulnerability can lead to unauthorized command execution due to discarded SSH permissions, which may allow attackers to bypass certificate restrictions such as forced commands after multi-factor authentication succeeds. The CVSS score is 6.3 (medium severity), indicating a moderate impact on confidentiality, integrity, and availability.
Mitigation Recommendations
The vendor advisory from Red Hat indicates that this issue is addressed in Red Hat Edge Manager 1.1.3 and related packages. Users should apply the security updates provided by Red Hat as referenced in the advisory (RHSA-2026:41019). Patch status is confirmed via the vendor advisory. No additional mitigations are specified beyond applying the official fix.
CVE-2026-39828: CWE-863: Incorrect Authorization in golang.org/x/crypto golang.org/x/crypto/ssh
Description
When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
CVSS v3.1
Score 6.3medium
Affected software
Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
The vulnerability in golang.org/x/crypto/ssh involves incorrect authorization handling (CWE-863). When an SSH server authentication callback returned PartialSuccessError along with non-nil Permissions, the permissions were discarded silently, potentially allowing unauthorized command execution by ignoring certificate restrictions. The fix changes this behavior so that returning non-nil Permissions with PartialSuccessError now causes a connection error, preventing the bypass of restrictions.
Potential Impact
This vulnerability can lead to unauthorized command execution due to discarded SSH permissions, which may allow attackers to bypass certificate restrictions such as forced commands after multi-factor authentication succeeds. The CVSS score is 6.3 (medium severity), indicating a moderate impact on confidentiality, integrity, and availability.
Mitigation Recommendations
The vendor advisory from Red Hat indicates that this issue is addressed in Red Hat Edge Manager 1.1.3 and related packages. Users should apply the security updates provided by Red Hat as referenced in the advisory (RHSA-2026:41019). Patch status is confirmed via the vendor advisory. No additional mitigations are specified beyond applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- Go
- Date Reserved
- 2026-04-07T18:13:03.528Z
- Cvss Version
- null
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-39828","vendor":"Red Hat"}]
Threat ID: 6a0fcdabe1370fbb487d4ffc
Added to database: 05/22/2026, 03:29:47 UTC
Last enriched: 07/29/2026, 21:32:31 UTC
Last updated: 07/31/2026, 21:26:40 UTC
Views: 90
Community Reviews
0 reviewsCrowdsource mitigation strategies, share intel context, and vote on the most helpful responses. Sign in to add your voice and help keep defenders ahead.
Want to contribute mitigation steps or threat intel context? Sign in or create an account to join the community discussion.
Actions
Updates to AI analysis require Pro Console access. Upgrade inside Console → Billing.
External Links
Need more coverage?
Upgrade to Pro Console for AI refresh and higher limits.
For incident response and remediation, OffSeq services can help resolve threats faster.
Latest Threats
Check if your credentials are on the dark web
Instant breach scanning across billions of leaked records. Free tier available.