Medium
glances — security advisory
Glances is an open-source system cross-platform monitoring tool. Glances recently added DNS rebinding protection for the MCP endpoint, but prior to version 4.5.2, the main REST/WebUI FastAPI application still accepts arbitrary `Host` headers and does not apply `TrustedHostMiddleware` or an equivalent host allowlist. As a result, the REST API, WebUI, and token endpoint remain reachable through attacker-controlled domains in classic DNS rebinding scenarios. Once the victim browser has rebound the attacker domain to the Glances service, same-origin policy no longer protects the API because the browser considers the rebinding domain to be the origin. This is a distinct issue from the previously reported default CORS weakness. CORS is not required for exploitation here because DNS rebinding causes the victim browser to treat the malicious domain as same-origin with the rebinding target. Version 4.5.2 contains a patch for the issue.
- Products
- glances
- Affected versions
- 2.10-2, 2.11.1-1, 2.11.1-2, 2.11.1-3, 2.11.1-3ubuntu0.1~esm1, 2.3-1build1, 2.3-1ubuntu0.1~esm1, 3.1.0-1, 3.1.1-1, 3.1.3-1, 3.1.3-1ubuntu0.1~esm1, 3.1.5-1, 3.2.3.1+dfsg-1, 3.2.4.2+dfsg-1, 3.4.0.3+dfsg-1, 4.3.0.8+dfsg-1, 4.3.1+dfsg-1, 4.3.3+dfsg-1, 4.5.4+dfsg-1, 4.5.5+dfsg-1, 4.5.6+dfsg-1
- Fixed versions
- Not specified
- CVEs
- CVE-2026-32632
- Confirmed fixed CVEs
- Not specified
- Updated in this feed
- 31 Oct 2026, 02:07 UTC · Revision 1
Source evidence
Glances is an open-source system cross-platform monitoring tool. Glances recently added DNS rebinding protection for the MCP endpoint, but prior to version 4.5.2, the main REST/WebUI FastAPI application still accepts arbitrary `Host` headers and does not apply `TrustedHostMiddleware` or an equivalent host allowlist. As a result, the REST API, WebUI, and token endpoint remain reachable through attacker-controlled domains in classic DNS rebinding scenarios. Once the victim browser has rebound the attacker domain to the Glances service, same-origin policy no longer protects the API because the browser considers the rebinding domain to be the origin. This is a distinct issue from the previously reported default CORS weakness. CORS is not required for exploitation here because DNS rebinding causes the victim browser to treat the malicious domain as same-origin with the rebinding target. Version 4.5.2 contains a patch for the issue.
osv:UBUNTU-CVE-2026-32632
glances
Fixed versions: Not specified
glances
Fixed versions: Not specified
glances
Fixed versions: Not specified
glances
Fixed versions: Not specified
glances
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glances
Fixed versions: Not specified
glances
Fixed versions: Not specified
glances
Fixed versions: Not specified
Complete source record
{
"id": "cd62cae809c5c43b426f0d12b11e827d4c652ac2857a848c248f53efeef63df1",
"url": "https://osv.dev/vulnerability/UBUNTU-CVE-2026-32632",
"method": "structured",
"payload": {
"kind": "advisory",
"title": "UBUNTU-CVE-2026-32632",
"summary": "Glances is an open-source system cross-platform monitoring tool. Glances recently added DNS rebinding protection for the MCP endpoint, but prior to version 4.5.2, the main REST/WebUI FastAPI application still accepts arbitrary `Host` headers and does not apply `TrustedHostMiddleware` or an equivalent host allowlist. As a result, the REST API, WebUI, and token endpoint remain reachable through attacker-controlled domains in classic DNS rebinding scenarios. Once the victim browser has rebound the attacker domain to the Glances service, same-origin policy no longer protects the API because the browser considers the rebinding domain to be the origin. This is a distinct issue from the previously reported default CORS weakness. CORS is not required for exploitation here because DNS rebinding causes the victim browser to treat the malicious domain as same-origin with the rebinding target. Version 4.5.2 contains a patch for the issue.",
"evidence": "osv:UBUNTU-CVE-2026-32632",
"products": [
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"name": {
"value": "glances",
"evidence": "/affected/0/package/name"
},
"prerequisites": [],
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"evidence": "/affected/0/versions"
},
{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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{
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"evidence": "/affected/3/versions"
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{
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{
"name": {
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{
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{
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},
{
"name": {
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"evidence": "/affected/6/package/name"
},
"prerequisites": [],
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"affected_versions": [
{
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"evidence": "/affected/6/versions"
},
{
"value": "4.5.4+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "4.5.5+dfsg-1",
"evidence": "/affected/6/versions"
},
{
"value": "4.5.6+dfsg-1",
"evidence": "/affected/6/versions"
}
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},
{
"name": {
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"evidence": "/affected/7/package/name"
},
"prerequisites": [],
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{
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"evidence": "/affected/7/versions"
},
{
"value": "4.3.3+dfsg-1",
"evidence": "/affected/7/versions"
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}
],
"severity": "medium",
"structured": {
"id": "UBUNTU-CVE-2026-32632",
"aliases": [
"UBUNTU-CVE-2026-32632"
],
"metrics": [
{
"type": "CVSS_V3",
"score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:L/A:N"
},
{
"type": "Ubuntu",
"score": "medium"
}
],
"affected": [
{
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{
"type": "ECOSYSTEM",
"events": [
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"introduced": "0"
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]
}
],
"package": {
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"purl": "pkg:deb/ubuntu/glances?arch=source&distro=esm-apps%2Fxenial",
"ecosystem": "Ubuntu:Pro:16.04:LTS"
},
"versions": [
"2.3-1build1",
"2.3-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32632.json"
},
"ecosystem_specific": {
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{
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"binary_version": "2.3-1ubuntu0.1~esm1"
}
]
}
},
{
"ranges": [
{
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}
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}
],
"package": {
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"purl": "pkg:deb/ubuntu/glances?arch=source&distro=esm-apps%2Fbionic",
"ecosystem": "Ubuntu:Pro:18.04:LTS"
},
"versions": [
"2.10-2",
"2.11.1-1",
"2.11.1-2",
"2.11.1-3",
"2.11.1-3ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32632.json"
},
"ecosystem_specific": {
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"package": {
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"ecosystem": "Ubuntu:Pro:20.04:LTS"
},
"versions": [
"3.1.0-1",
"3.1.1-1",
"3.1.3-1",
"3.1.3-1ubuntu0.1~esm1"
],
"database_specific": {
"source": "https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-32632.json"
},
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"binary_version": "3.1.3-1ubuntu0.1~esm1"
}
]
}
},
{
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},
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"3.2.3.1+dfsg-1",
"3.2.4.2+dfsg-1"
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},
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],
"database_specific": {
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},
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"4.5.5+dfsg-1",
"4.5.6+dfsg-1"
],
"database_specific": {
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{
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"ecosystem": "Ubuntu:26.04:LTS"
},
"versions": [
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],
"modified": "2026-10-17T12:58:09.781025319Z",
"provider": "osv",
"upstream": [
"CVE-2026-32632"
],
"references": [
"https://ubuntu.com/security/CVE-2026-32632",
"https://www.cve.org/CVERecord?id=CVE-2026-32632",
"https://github.com/nicolargo/glances/security/advisories/GHSA-hhcg-r27j-fhv9",
"https://github.com/nicolargo/glances/commit/5850c564ee10804fdf884823b9c210eb954dd1f9",
"https://github.com/nicolargo/glances/releases/tag/v4.5.2"
]
},
"related_cves": [
{
"value": "CVE-2026-32632",
"evidence": "/upstream"
}
],
"security_relevant": true,
"severity_evidence": "/severity/0/score"
},
"source_id": "core-osv",
"document_id": 358254,
"published_at": "2026-03-18T18:16:00+00:00"
}