Vulnerability in OctoPrint (CVE-2026-35163)
Summary
Vulnerability in OctoPrint (CVE-2026-35163). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 2.0.0rc3 or later.
Original description
The description as published by the source.
OctoPrint provides a web interface for controlling consumer 3D printers. Prior to 1.11.8 and 2.0.0rc3, Suppressed Command notification popups use PNotify rendering for printer-controlled payload.command and payload.message values in src/octoprint/static/js/app/viewmodels/terminal.js without HTML escaping. An attacker who convinces a victim to print a crafted file can inject HTML and JavaScript into the notification, disrupt prints, read information available to the victim including sensitive settings when permitted, or perform actions in the victim's OctoPrint session. This issue is fixed in versions 1.11.8 and 2.0.0rc3.
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-2026-35163 has been found in OctoPrint.
Risk of unauthorized operations or information disclosure.
What to do: upgrade OctoPrint to 2.0.0rc3 or later.
If unsure, ask your IT team or search "OctoPrint CVE-2026-35163" on the vendor's site.
CVE-2026-35163 (OctoPrint) — CWE-80
Patched: 2.0.0rc3 — 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-80) exists in OctoPrint.
Check the vendor advisory for the affected versions of OctoPrint.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 2.0.0rc3.
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 'OctoPrint' . 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
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1Identify exposure identify
grep -r 'OctoPrint' . | 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
OctoPrint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 OctoPrint to 2.0.0rc3ステージング環境で 2.0.0rc3 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。
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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
References
- advisory github.com
- advisory nvd.nist.gov
- advisory github.com
- package github.com
- patch github.com
- patch github.com
- web github.com
- web github.com
- web github.com
- web github.com