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CVE-2026-2603
high
CVSS 8.1
Vulnerability in org.keycloak:keycloak-services (CVE-2026-2603)
Summary
vulnerability in org.keycloak:keycloak-services (CVE-2026-2603). Confidential information can be exposed externally. Mitigation: upgrade to `26.5.5` or later.
AI summary snake-internal / snake-material-v2
A vulnerability tracked as **CVE-2026-2603** has been found in org.keycloak:keycloak-services.
Confidential information can be exposed externally. CVSS score: 8.1/10.
What to do: upgrade org.keycloak:keycloak-services to **26.5.5** or later.
If unsure, ask your IT team or search "org.keycloak:keycloak-services CVE-2026-2603" on the vendor's site.
CVE-2026-2603 (org.keycloak:keycloak-services) — CWE-306 / CVSS v3 8.1
Attack vector: remote (network-reachable) / no user interaction
Patched: `26.5.5` — 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-306) exists in org.keycloak:keycloak-services.
📍 Affected scope
org.keycloak:keycloak-services — .
🔥 Severity
Severity: High (CVSS 8.1/10). Confidential information can be exposed externally
🔧 How to fix
Update to **26.5.5**.
🛡️ 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 'org.keycloak:keycloak-services' .` 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 'org.keycloak:keycloak-services' . | 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.keycloak:keycloak-services` 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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6Apply patch patch
Upgrade org.keycloak:keycloak-services to 26.5.5ステージング環境で 26.5.5 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
maven
org.keycloak:keycloak-services
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.5.5"}]}]
maven
org.keycloak:keycloak-server-spi-private
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"26.5.5"}]}]
References
- advisory https://nvd.nist.gov/vuln/detail/CVE-2026-2603
- package https://github.com/keycloak/keycloak
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c
- web 134c704f-9b21-4f2e-91b3-4a467353bcc0
- web https://github.com/keycloak/keycloak/issues/46911
- web https://github.com/keycloak/keycloak/commit/8ed7e59dc08d79751a27c23aadb590f06b43f132
- web https://github.com/keycloak/keycloak/pull/46932
- web https://github.com/keycloak/keycloak/commit/4fd5367e6cc28cfa68fb2240fc459c12b1fdbf2a
- web https://github.com/keycloak/keycloak/commits/26.5.5
- web https://github.com/advisories/GHSA-x4p7-7chp-64hq
- web 0b0ca135-0b70-47e7-9f44-1890c2a1c46c