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.
Original description
The description as published by the source.
XWiki Platform is a generic wiki platform. Versions prior to 18.1.0-rc-1, 17.10.3, 17.4.9, and 16.10.17 allow access to read configuration files by using URLs such as http://localhost:8080/bin/ssx/Main/WebHome?resource=/../../WEB-INF/xwiki.cfg&minify=false, leading to Path Traversal. The vulnerability is can be exploited via resources parameter the ssx and jsx endpoints by using leading slashes. This issue has been patched in 18.1.0-rc-1, 17.10.3, 17.4.9, 16.10.17.
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-2026-23734 has been found in org.xwiki.commons:xwiki-commons-classloader-api.
Risk of unauthorized operations or information disclosure.
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.
A vulnerability (CWE-23) exists in org.xwiki.commons:xwiki-commons-classloader-api.
Check the vendor advisory for the affected versions of org.xwiki.commons:xwiki-commons-classloader-api.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 18.0.0-rc-1.
Workaround: There is no known workaround, other than upgrading XWiki.
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Audit SBOM/dependencies 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
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで org.xwiki.commons:xwiki-commons-classloader-api を使っているサービスとバージョンを洗い出す。
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2Apply 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。
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3Apply 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を含めること。
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4Post-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
- web jira.xwiki.org
- web github.com