CVE-2026-59846: Vulnerability in Red Hat Red Hat Enterprise Linux 10
CVE-2026-59846 is a low-severity vulnerability in libssh used by Red Hat Enterprise Linux 10. It involves improper handling of a malicious username expanded through %r in ProxyCommand, which can inject shell metacharacters. This may expose environment variables and cause unintended shell behavior. No known exploits are reported in the wild. The vendor advisory does not specify a patch or remediation status.
AI Analysis
Technical Summary
This vulnerability in libssh affects Red Hat Enterprise Linux 10. When a malicious username is expanded through the %r placeholder in ProxyCommand handling, it can inject shell metacharacters. This injection can lead to exposure of environment variables and unintended shell command execution behavior. The CVSS 3.1 score is 3.9 (low), reflecting limited impact on confidentiality and integrity with no availability impact. The vendor advisory from Red Hat is published but does not currently provide explicit remediation or patch information.
Potential Impact
The vulnerability allows an attacker with local privileges to inject shell metacharacters via a crafted username in ProxyCommand, potentially exposing environment variables and causing unintended shell behavior. The impact is limited to confidentiality and integrity with no known availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-59846 for current remediation guidance. No official fix or workaround is currently documented in the advisory. Users should monitor the vendor site for updates.
CVE-2026-59846: Vulnerability in Red Hat Red Hat Enterprise Linux 10
Description
CVE-2026-59846 is a low-severity vulnerability in libssh used by Red Hat Enterprise Linux 10. It involves improper handling of a malicious username expanded through %r in ProxyCommand, which can inject shell metacharacters. This may expose environment variables and cause unintended shell behavior. No known exploits are reported in the wild. The vendor advisory does not specify a patch or remediation status.
CVSS v3.1
Score 3.9low
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
This vulnerability in libssh affects Red Hat Enterprise Linux 10. When a malicious username is expanded through the %r placeholder in ProxyCommand handling, it can inject shell metacharacters. This injection can lead to exposure of environment variables and unintended shell command execution behavior. The CVSS 3.1 score is 3.9 (low), reflecting limited impact on confidentiality and integrity with no availability impact. The vendor advisory from Red Hat is published but does not currently provide explicit remediation or patch information.
Potential Impact
The vulnerability allows an attacker with local privileges to inject shell metacharacters via a crafted username in ProxyCommand, potentially exposing environment variables and causing unintended shell behavior. The impact is limited to confidentiality and integrity with no known availability impact. There are no known exploits in the wild.
Mitigation Recommendations
Patch status is not yet confirmed — check the Red Hat advisory at https://access.redhat.com/security/cve/CVE-2026-59846 for current remediation guidance. No official fix or workaround is currently documented in the advisory. Users should monitor the vendor site for updates.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- redhat
- Date Reserved
- 2026-07-07T15:40:24.561Z
- Cvss Version
- 3.1
- State
- PUBLISHED
- Remediation Level
- null
- Vendor Advisory Urls
- [{"url":"https://access.redhat.com/security/cve/CVE-2026-59846","vendor":"Red Hat"}]
Threat ID: 6a5f703f2a4a8d59892bbe50
Added to database: 07/21/2026, 13:12:31 UTC
Last enriched: 07/21/2026, 13:27:35 UTC
Last updated: 07/21/2026, 14:25:27 UTC
Views: 9
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