Vulnerability in com.linecorp.centraldogma:centraldogma-server-auth-shiro (CVE-2026-11748)
Summary
Vulnerability in com.linecorp.centraldogma:centraldogma-server-auth-shiro (CVE-2026-11748). Risk of unauthorized operations or information disclosure. Exploitable via POST /api/v1/login. Mitigation: upgrade to 0.84.0 or later.
Original description
The description as published by the source.
Vulnerability
SearchFirstActiveDirectoryRealm.findUserDn() substitutes the user-supplied username from the login form into an LDAP search filter template (default cn={0}) without escaping RFC 4515 filter metacharacters (*, (, ), \, NUL). Combined with SearchControls.setCountLimit(1) on the same call site, this allows three distinct attack primitives:
- Authentication confusion — typing username
*causes the realm to construct filtercn=*, return the first directory entry (typically a privileged account in AD ordering), and attempt bind against that DN with the attacker's password. - Audit log evasion — payload
bob)(uid=aliceis recorded verbatim in audit logs while the realm searches with the malformed filter, breaking accountability/compliance (SOX, PCI-DSS, ISO 27001). - Directory enumeration — wildcards and timing differences allow reconnaissance of OU structure and admin group membership.
A repo-wide search for any LDAP escape helper (escapeLdap, encodeFilter, escapeFilter, ldapEscape) returns zero hits — the defense is not just missing, it was never added.
Applicability note: This realm is opt-in. The shipped default LDAP example (
dist/src/conf/shiro.example.ldap.ini) uses Shiro'sDefaultLdapRealmwithuserDnTemplateand is NOT affected. However, the realm exists precisely to support Active Directory environments where users log in viasAMAccountNameand the realm must search for the DN first — th…
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-2026-11748 has been found in com.linecorp.centraldogma:centraldogma-server-auth-shiro.
Attackers can target a specific entry point like POST /api/v1/login over the network to misuse the product.
Risk of unauthorized operations or information disclosure.
What to do: upgrade com.linecorp.centraldogma:centraldogma-server-auth-shiro to 0.84.0 or later.
If unsure, ask your IT team or search "com.linecorp.centraldogma:centraldogma-server-auth-shiro CVE-2026-11748" on the vendor's site.
CVE-2026-11748 (com.linecorp.centraldogma:centraldogma-server-auth-shiro) — CWE-90
Attack surface: POST /api/v1/login / escapeLdap / encodeFilter / escapeFilter
Patched: 0.84.0 — 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-90) exists in com.linecorp.centraldogma:centraldogma-server-auth-shiro. Attackers reach the vulnerable code path via POST /api/v1/login.
Check the vendor advisory for the affected versions of com.linecorp.centraldogma:centraldogma-server-auth-shiro. Attack surface: POST /api/v1/login / escapeLdap / encodeFilter / escapeFilter.
Severity: ?. Risk of unauthorized operations or information disclosure.
Update to 0.84.0.
Until the patch is applied: disable the affected feature, apply WAF rules, or restrict access via network ACLs.
Search webserver/proxy logs for unusual POST /api/v1/login requests with malformed payloads or SQL meta-characters. Audit SBOM/dependencies to find affected services.
Response actions
Concrete steps and command examples for SOC/SRE teams to execute in order
-
1Identify exposure identify
Audit SBOM/dependencies for affected components.資産台帳・SBOM・依存マニフェストで com.linecorp.centraldogma:centraldogma-server-auth-shiro を使っているサービスとバージョンを洗い出す。
-
2Hunt for indicators of compromise detect
grep 'POST /api/v1/login' /var/log/nginx/access.log | grep -E '(unusual_payload|sqli_pattern)'アクセスログで
POST /api/v1/loginへの異常なリクエスト (不正な認証ヘッダ・SQLメタ文字)を過去 30〜90日分捜索。WAF/SIEM があれば該当パスのアラート発火履歴を確認。 -
3Apply patch patch
Upgrade com.linecorp.centraldogma:centraldogma-server-auth-shiro to 0.84.0ステージング環境で 0.84.0 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 2 で見つけた異常検知の続報チェックを含めること。
-
4Post-deployment verification verify
Replay attack against POST /api/v1/login on staging to confirm patch closes the vector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 2 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
References
- web github.com
- web nvd.nist.gov
- web github.com