Vulnerability in Mcgill (CVE-2026-35400)
Summary
Vulnerability in Mcgill (CVE-2026-35400). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 27.0.3 or later.
Original description
The description as published by the source.
LORIS (Longitudinal Online Research and Imaging System) is a self-hosted web application that provides data- and project-management for neuroimaging research. From 20.0.0 to before 27.0.3 and 28.0.1, an endpoint in the publication module was incorrectly trusting the baseURL submitted by a user's POST request rather than the internal LORIS value. This could result in a theoretical attacker with publication module access forging an email to an external domain under the attacker's control which appeared to come from LORIS. This vulnerability is fixed in 27.0.3 and 28.0.1.
Source: NIST National Vulnerability Database 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-2026-35400 has been found in Mcgill.
Risk of unauthorized operations or information disclosure. CVSS score: 3.5/10.
What to do: upgrade Mcgill to 27.0.3 or later.
If unsure, ask your IT team or search "Mcgill CVE-2026-35400" on the vendor's site.
CVE-2026-35400 (Mcgill) — CWE-59 / CVSS v3 3.5
Attack vector: remote (network-reachable)
Patched: 27.0.3 — 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-59) exists in Mcgill.
Check the vendor advisory for the affected versions of Mcgill.
Severity: Low (CVSS 3.5/10). Risk of unauthorized operations or information disclosure.
Update to 27.0.3.
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 'Mcgill' . 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 'Mcgill' . | 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
Mcgill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 Mcgill to 27.0.3ステージング環境で 27.0.3 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。
References
- advisory github.com
- advisory github.com
- advisory nvd.nist.gov