Vulnerability in glances (CVE-2026-46608)
Summary
Vulnerability in glances (CVE-2026-46608). Confidential information can be exposed externally. Exploitable via cors_origins. Mitigation: upgrade to 4.5.5 or later.
Original description
The description as published by the source.
Summary
The Glances XML-RPC server (glances -s) introduced a configurable CORS origin list in version 4.5.3 as a mitigation for CVE 2026-33533. However, the implementation silently falls back to Access-Control-Allow-Origin: * whenever cors_origins contains more than one entry. An operator who configures an explicit two-entry allowlist (e.g. two internal dashboard origins) intending to restrict browser access instead receives the unrestricted wildcard — the same exposure that the original CVE described. A malicious web page served from any origin can issue a CORS simple request to /RPC2 and read the full system monitoring dataset without the victim's knowledge.
Details
Affected file: glances/server.py, class GlancesXMLRPCServer, line 113
Direct URL (commit 04579778e733d705898a169e049dc84772c852da):
# server.py (GlancesXMLRPCServer.__init__)
cors_origins = self.args.cors_origins # list from config / CLI
# Line 113 — the incomplete fix:
self.cors_origin = cors_origins[0] if len(cors_origins) == 1 else '*'
# ^^^
# Any allowlist with 2+ entries collapses to the wildcard
The cors_origin value is then echoed back as the Access-Control-Allow-Origin response header for every request (line ~147 in the same file):
self.send_header('Access-Cont…
Source: GitHub Security Advisories (Global) NVD GitHub Advisory
Auto-generated summary
Assembled by SecPulse from the source data (CVSS, CWE, affected versions) using templates — no AI involved. Check the original description and references below for exact details.
A vulnerability tracked as CVE-2026-46608 has been found in glances.
Attackers can target a specific entry point like cors_origins over the network to misuse the product.
Confidential information can be exposed externally. CVSS score: 7.4/10.
What to do: upgrade glances to 4.5.5 or later.
If unsure, ask your IT team or search "glances CVE-2026-46608" on the vendor's site.
CVE-2026-46608 (glances) — CWE-183 / CVSS v3 7.4
Attack vector: remote (network-reachable) / unauthenticated
Attack surface: cors_origins / GlancesXMLRPCServer / cors_origin / Origin
Patched: 4.5.5 — apply immediately
Plan: 1) Audit SBOM/dependencies, 2) Stage→prod upgrade, 3) Add WAF/proxy monitoring on affected endpoints, 4) Hunt IOCs in logs.
Refs: see the GHSA / vendor advisory / patched release linked on this page.
A vulnerability (CWE-183) exists in glances. Attackers reach the vulnerable code path via cors_origins without authentication.
Check the vendor advisory for the affected versions of glances. Attack surface: cors_origins / GlancesXMLRPCServer / cors_origin / Origin.
Severity: High (CVSS 7.4/10). Confidential information can be exposed externally.
Update to 4.5.5.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run grep -r 'glances' . against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
grep -r 'glances' . | grep -v node_modulesリポジトリと本番環境の依存ファイル (package-lock.json / requirements.txt / go.sum / Gemfile.lock 等) で
glancesを grep し、稼働しているサービス・バージョンを把握する。 -
2Apply patch patch
Upgrade glances to 4.5.5ステージング環境で 4.5.5 に上げて回帰テスト → 本番反映。回帰テストはアプリの主要ハッピーパスを含めること。
-
3Post-deployment verification verify
Confirm patched version is live in productionパッチ適用後、ステージングで PoC または同等の悪用パターンを再現して脆弱性が閉じたことを確認。本番ではアクセスログ・WAF でアラート再発が無いか継続監視。
Affected packages
Fix status by distribution
Fixed packages published by each distribution for this CVE
- Debian DEBIAN-CVE-2026-46608 glances
- Ubuntu UBUNTU-CVE-2026-46608 glances
References
- advisory github.com
- advisory nvd.nist.gov
- package github.com
- web github.com
- web github.com
- web github.com
- web pypi.org