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4 vulnerabilities found for NetworkManager-vpnc by GNOME
CVE-2026-91841 (GCVE-0-2026-91841)
Vulnerability from nvd – Published: 2026-09-25 17:56 – Updated: 2026-09-26 03:55
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: incomplete fix for cve-2018-10900 allows root privilege escalation via ca-file path newline injection
Summary
A flaw was found in NetworkManager-vpnc, a VPN plugin for NetworkManager. A local unprivileged user can exploit this vulnerability by injecting a newline character into the CA-File path. This manipulation allows the user to execute arbitrary commands as the root user, leading to local privilege escalation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 00:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91841 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533651 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
(semver)
|
Date Public
2026-09-15 09:55
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CVE-2026-91840 (GCVE-0-2026-91840)
Vulnerability from nvd – Published: 2026-09-25 17:56 – Updated: 2026-09-26 03:55
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username
Summary
A flaw was found in NetworkManager-vpnc. This vulnerability allows a local unprivileged user to escalate privileges to root. By injecting a newline character into the VPN username field, an attacker can manipulate the vpnc configuration to execute an arbitrary program with root privileges when the malicious VPN connection is activated.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 00:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91840 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533642 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
(semver)
|
Date Public
2026-09-15 09:50
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CVE-2026-91841 (GCVE-0-2026-91841)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-26 03:55
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: incomplete fix for cve-2018-10900 allows root privilege escalation via ca-file path newline injection
Summary
A flaw was found in NetworkManager-vpnc, a VPN plugin for NetworkManager. A local unprivileged user can exploit this vulnerability by injecting a newline character into the CA-File path. This manipulation allows the user to execute arbitrary commands as the root user, leading to local privilege escalation.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 00:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91841 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533651 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
(semver)
|
Date Public
2026-09-15 09:55
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CVE-2026-91840 (GCVE-0-2026-91840)
Vulnerability from cvelistv5 – Published: 2026-09-25 17:56 – Updated: 2026-09-26 03:55
VLAI
EPSS
VEX
Title
Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username
Summary
A flaw was found in NetworkManager-vpnc. This vulnerability allows a local unprivileged user to escalate privileges to root. By injecting a newline character into the VPN username field, an attacker can manipulate the vpnc configuration to execute an arbitrary program with root privileges when the malicious VPN connection is activated.
Severity
7.8 (High)
SSVC
Exploitation: none
Automatable: no
Technical Impact: total
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-09-25 00:00 UTC
CWE
- CWE-93 - Improper Neutralization of CRLF Sequences ('CRLF Injection')
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://access.redhat.com/security/cve/CVE-2026-91840 | vdb-entryx_refsource_REDHAT |
| https://bugzilla.redhat.com/show_bug.cgi?id=2533642 | issue-trackingx_refsource_REDHAT |
| https://gitlab.gnome.org/Archive/NetworkManager-v… |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| GNOME | NetworkManager-vpnc |
Affected:
0 , < *
(semver)
|
Date Public
2026-09-15 09:50
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"descriptions": [
{
"cweId": "CWE-93",
"description": "Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)",
"lang": "en",
"type": "CWE"
}
]
}
],
"providerMetadata": {
"dateUpdated": "2026-09-25T17:56:32.736Z",
"orgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
"shortName": "fedora"
},
"references": [
{
"tags": [
"vdb-entry",
"x_refsource_REDHAT"
],
"url": "https://access.redhat.com/security/cve/CVE-2026-91840"
},
{
"name": "RHBZ#2533642",
"tags": [
"issue-tracking",
"x_refsource_REDHAT"
],
"url": "https://bugzilla.redhat.com/show_bug.cgi?id=2533642"
},
{
"url": "https://gitlab.gnome.org/Archive/NetworkManager-vpnc/-/work_items/19"
}
],
"timeline": [
{
"lang": "en",
"time": "2026-09-15T09:50:37.313Z",
"value": "Reported to Red Hat."
},
{
"lang": "en",
"time": "2026-09-15T09:50:37.313Z",
"value": "Made public."
}
],
"title": "Networkmanager-vpnc: networkmanager-vpnc: local privilege escalation to root via newline injection in vpn username",
"workarounds": [
{
"lang": "en",
"value": "If vpnc VPN connections are not required, the NetworkManager-vpnc package can be removed to eliminate the vulnerability. This action will prevent the system from establishing vpnc-based VPN connections.\n\nTo remove the package, execute the following command as root:\n`# dnf remove NetworkManager-vpnc`\n\nNote that removing this package may impact functionality if vpnc VPNs are actively used."
}
],
"x_generator": {
"engine": "cvelib 1.8.0"
},
"x_redhatCweChain": "CWE-93: Improper Neutralization of CRLF Sequences (\u0027CRLF Injection\u0027)"
}
},
"cveMetadata": {
"assignerOrgId": "92fb86c3-55a5-4fb5-9c3f-4757b9e96dc5",
"assignerShortName": "fedora",
"cveId": "CVE-2026-91840",
"datePublished": "2026-09-25T17:56:32.736Z",
"dateReserved": "2026-09-15T08:28:01.333Z",
"dateUpdated": "2026-09-26T03:55:52.959Z",
"state": "PUBLISHED"
},
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"dataVersion": "5.2"
}