Vulnerability in io.jenkins.plugins:mcp-server (CVE-2026-57300)
Summary
Vulnerability in io.jenkins.plugins:mcp-server (CVE-2026-57300). Risk of unauthorized operations or information disclosure. Mitigation: upgrade to 0.178.vffe5a or later.
Original description
The description as published by the source.
Jenkins MCP Server Plugin 0.177.v629fdb_2557fe and earlier does not perform a permission check in the getReplayScripts MCP tool that returns the replay script of a Pipeline build.
This allows attackers with Item/Read permission to obtain the Pipeline script of jobs.
MCP Server Plugin 0.178.vffe5a_e770f3b_ requires Item/Extended Read permission to return the replay script of a Pipeline build through the getReplayScripts MCP tool.
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-2026-57300 has been found in io.jenkins.plugins:mcp-server.
Risk of unauthorized operations or information disclosure. CVSS score: 4.3/10.
What to do: upgrade io.jenkins.plugins:mcp-server to 0.178.vffe5a or later.
If unsure, ask your IT team or search "io.jenkins.plugins:mcp-server CVE-2026-57300" on the vendor's site.
CVE-2026-57300 (io.jenkins.plugins:mcp-server) — CWE-862 / CVSS v3 4.3
Attack vector: remote (network-reachable) / no user interaction
Patched: 0.178.vffe5a — 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-862) exists in io.jenkins.plugins:mcp-server.
Check the vendor advisory for the affected versions of io.jenkins.plugins:mcp-server.
Severity: Medium (CVSS 4.3/10). Risk of unauthorized operations or information disclosure.
Update to 0.178.vffe5a.
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. 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 io.jenkins.plugins:mcp-server 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 patch patch
Upgrade io.jenkins.plugins:mcp-server to 0.178.vffe5aステージング環境で 0.178.vffe5a 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
- web jenkins.io
- web nvd.nist.gov
- web github.com
- web github.com
- web github.com