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CVE-2026-41293
critical
CVSS 9.8
Vulnerability in tomcat (CVE-2026-41293)
Summary
vulnerability in tomcat (CVE-2026-41293). Successful exploitation can lead to full system takeover. Mitigation: upgrade to `10.1.55, 11.0.22, 9.0.118` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-41293** has been found in tomcat.
Successful exploitation can lead to full system takeover. CVSS score: 9.8/10.
What to do: upgrade tomcat to **10.1.55, 11.0.22, 9.0.118** or later.
If unsure, ask your IT team or search "tomcat CVE-2026-41293" on the vendor's site.
CVE-2026-41293 (tomcat) — CWE-20 / CVSS v3 9.8
Attack vector: remote (network-reachable) / unauthenticated / no user interaction
Patched: `10.1.55, 11.0.22, 9.0.118` — 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.
❓ What is the problem
**A vulnerability** (CWE-20) exists in tomcat.
📍 Affected scope
tomcat — .
🔥 Severity
Severity: Critical (CVSS 9.8/10). Successful exploitation can lead to full system takeover
🔧 How to fix
Update to **10.1.55, 11.0.22, 9.0.118**.
🛡️ Workaround
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
🔍 Detection
Search webserver/proxy logs for unusual request patterns matching this CVE's known IOCs. Run `grep -r 'tomcat' .` 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
-
1Identify exposure identify
grep -r 'tomcat' . | 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 `tomcat` を grep し、稼働しているサービス・バージョンを把握する。
-
6Apply patch patch
Upgrade tomcat to 10.1.55, 11.0.22, 9.0.118ステージング環境で 10.1.55, 11.0.22, 9.0.118 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
Bitnami
tomcat
[{"type":"SEMVER","events":[{"introduced":"10.0.0"},{"fixed":"10.1.55"},{"introduced":"11.0.0"},{"fixed":"11.0.22"},{"introduced":"9.0.0"},{"fixed":"9.0.118"}]}]
maven
org.apache.tomcat.embed:tomcat-embed-core
[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-M1"},{"fixed":"11.0.22"}]}]
maven
org.apache.tomcat:tomcat
[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-M1"},{"fixed":"11.0.22"}]}]
maven
org.apache.tomcat:tomcat-catalina
[{"type":"ECOSYSTEM","events":[{"introduced":"11.0.0-M1"},{"fixed":"11.0.22"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-41293
- package https://github.com/apache/tomcat
- web https://lists.apache.org/thread/qwg0q16z7xkb2qrr853wdll5531mvl1r
- web http://www.openwall.com/lists/oss-security/2026/05/12/13
- web https://github.com/advisories/GHSA-r29c-68gh-xp6x
- web https://github.com/apache/tomcat/commit/19f17a257797e8d139b33ff9c88d362a273be148
- web https://github.com/apache/tomcat/commit/1c70480466572c9192ed412ebefcd43fc63137fd
- web https://github.com/apache/tomcat/commit/2a2476460e823789f530a22207873ea8cd6eff3b
- web https://github.com/apache/tomcat/commit/3915fd27e6810b14ccd21e3d900bd8faef44d3df
- web https://github.com/apache/tomcat/commit/57c2b3bfd62792631e1df24cf4237b990a0b36fa
- web https://github.com/apache/tomcat/commit/c2925554c677da57390f940d856871e18daaacab
- web https://github.com/apache/tomcat/commit/cf9452443bcbf3b1a4b435ef7d624364f1b65ca3
- web https://github.com/apache/tomcat/commit/e5cef9618c3f4fd31bd6fb1e83f0f18022280dac
- web https://github.com/apache/tomcat/commit/f72a6174ab1f0f5a053435f80448b4f6837fe6d7
- web https://tomcat.apache.org/security-10.html
- web https://tomcat.apache.org/security-11.html
- web https://tomcat.apache.org/security-9.html