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CVE-2026-42150
medium
CVSS 5.1
Cross-Site Scripting (XSS) in wlc (CVE-2026-42150)
Summary
cross-site scripting in wlc (CVE-2026-42150). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `2.0.0` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-42150** has been found in wlc.
Risk of unauthorized operations or information disclosure. CVSS score: 5.1/10.
What to do: upgrade wlc to **2.0.0** or later.
If unsure, ask your IT team or search "wlc CVE-2026-42150" on the vendor's site.
CVE-2026-42150 (wlc) — CWE-79 / CVSS v3 5.1
Attack vector: remote (network-reachable)
Patched: `2.0.0` — apply immediately
Workaround: The only vulnerable code path is HTML output which is opt-in.
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.
❓ What is the problem
**Cross-site scripting (XSS)** (CWE-79) exists in wlc.
📍 Affected scope
wlc — .
🔥 Severity
Severity: Medium (CVSS 5.1/10). Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **2.0.0**.
🛡️ Workaround
Workaround: The only vulnerable code path is HTML output which is opt-in.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'wlc' .` against your dependency files (package-lock.json, requirements.txt, go.sum) to find affected services.
Response Actions (7 steps)
Concrete steps and command examples for SOC/SRE teams to execute in order
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1Identify exposure identify
grep -r 'wlc' . | 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 `wlc` を grep し、稼働しているサービス・バージョンを把握する。
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5Apply temporary workaround mitigate
The only vulnerable code path is HTML output which is opt-in.パッチが適用されるまでの応急処置として、The only vulnerable code path is HTML output which is opt-in. を実施。回避策の副作用 (機能低下) を確認した上で。
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6Apply patch patch
Upgrade wlc to 2.0.0ステージング環境で 2.0.0 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と、Step 3 で見つけた異常検知の続報チェックを含めること。
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7Post-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 Step 3 と同じログクエリでアラート再発が無いか継続監視。
Affected packages
pip
wlc
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0"}]}]
PyPI
wlc
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"2.0.0"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-42150
- package https://github.com/WeblateOrg/wlc
- web https://github.com/WeblateOrg/wlc/commit/0f3e58f6d7457b05d48ef40f579a172c4c8b8469
- web https://github.com/WeblateOrg/wlc/pull/1327
- web https://github.com/WeblateOrg/wlc/releases/tag/2.0.0
- web https://github.com/WeblateOrg/wlc/security/advisories/GHSA-gx2m-mcc2-r4p3
- web https://github.com/advisories/GHSA-gx2m-mcc2-r4p3