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CVE-2026-23734

Vulnerability in org.xwiki.commons:xwiki-commons-classloader-api (CVE-2026-23734)

Summary

vulnerability in org.xwiki.commons:xwiki-commons-classloader-api (CVE-2026-23734). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to `18.0.0-rc-1` or later.

AI summary snake-internal / snake-material-v2

A vulnerability tracked as **CVE-2026-23734** has been found in org.xwiki.commons:xwiki-commons-classloader-api. Risk of unauthorized operations or information disclosure. CVSS score: ?/10. What to do: upgrade org.xwiki.commons:xwiki-commons-classloader-api to **18.0.0-rc-1** or later. If unsure, ask your IT team or search "org.xwiki.commons:xwiki-commons-classloader-api CVE-2026-23734" on the vendor's site.
CVE-2026-23734 (org.xwiki.commons:xwiki-commons-classloader-api) — CWE-23 / Patched: `18.0.0-rc-1` — apply immediately Workaround: There is no known workaround, other than upgrading XWiki. 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
**A vulnerability** (CWE-23) exists in org.xwiki.commons:xwiki-commons-classloader-api.
📍 Affected scope
org.xwiki.commons:xwiki-commons-classloader-api — .
🔥 Severity
Severity: ?. Risk of unauthorized operations or information disclosure
🔧 How to fix
Update to **18.0.0-rc-1**.
🛡️ Workaround
Workaround: There is no known workaround, other than upgrading XWiki.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'org.xwiki.commons:xwiki-commons-classloader-api' .` 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

  1. 1
    Identify exposure identify
    grep -r 'org.xwiki.commons:xwiki-commons-classloader-api' . | 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 `org.xwiki.commons:xwiki-commons-classloader-api` を grep し、稼働しているサービス・バージョンを把握する。

  2. 5
    Apply temporary workaround mitigate
    There is no known workaround, other than upgrading XWiki.

    パッチが適用されるまでの応急処置として、There is no known workaround, other than upgrading XWiki. を実施。回避策の副作用 (機能低下) を確認した上で。

  3. 6
    Apply patch patch
    Upgrade org.xwiki.commons:xwiki-commons-classloader-api to 18.0.0-rc-1

    ステージング環境で 18.0.0-rc-1 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。

  4. 7
    Post-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

maven org.xwiki.commons:xwiki-commons-classloader-api
[{"type":"ECOSYSTEM","events":[{"introduced":"18.0.0-rc-1"},{"fixed":"18.1.0-rc-1"}]}]

References

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