Central Dogma: LDAP injection in SearchFirstActiveDirectoryRealm enables authentication confusion and audit log evasion

Exploitation

No confirmed exploitation recorded. Patch Next marks exploitation only from CISA KEV.

CVSS 4.0

6.9 · CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:N/SC:L/SI:N/SA:N · score source

EPSS

• CVE-2026-11748: 0.48% estimated exploitation activity in the next 30 days; percentile 41.30 (FIRST EPSS, 2026-11-03). This is a model estimate, not proof of exploitation or customer exposure.

As published by the source; long descriptions are shortened.

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: 1. Authentication confusion — typing username causes the realm to construct filter cn=, return the first directory entry (typically a privileged account in AD ordering), and attempt bind against that DN with the attacker's password. 2. Audit log evasion — payload bob)(uid=alice is recorded verbatim in audit logs while the realm searches with the malformed filter, breaking accountability/compliance (SOX, PCI-DSS, ISO 27001). 3. 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,…

Published by the source

11 Sep 2026, 20:43 UTC

Last modified by the source

11 Sep 2026, 21:00 UTC

Source last checked

26 Oct 2026, 16:55 UTC

1. Revision 3 · amended · 26 Oct 2026

   Amended from ghsa record GHSA-98q5-5qh2-7w75

2. Revision 2 · amended · 25 Oct 2026

   Reviewed OSV alias/range/CVSS4 correction; package source scopes and original publication preserved. No customer finding resolved.

3. Revision 1 · created · 24 Oct 2026

   Published from osv record GHSA-98q5-5qh2-7w75

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# Patch Next advisory brief: CVE-2026-11748

Advisory: Central Dogma: LDAP injection in SearchFirstActiveDirectoryRealm enables authentication confusion and audit log evasion
IDs: CVE-2026-11748, GHSA-98q5-5qh2-7w75
Record: https://patchnext.com/advisories/cve-2026-11748 (revision 3, source checked 26 Oct 2026, 16:55 UTC)
Inventory: none attached. This brief comes from a public page and does not say whether any deployment is affected.
Severity: Medium (CVSS 6.9)
Exploitation: no confirmed exploitation recorded. Patch Next confirms exploitation only from CISA KEV.
Vendor response: Vendor fix available; fixed versions by package: com.linecorp.centraldogma:centraldogma-server-auth-shiro 0.84.0. A vendor fix does not mean a deployment is fixed.

## Affected components
- Maven com.linecorp.centraldogma:centraldogma-server-auth-shiro: affected < 0.84.0; fixed in 0.84.0

## Suggested inspection (read-only)
- Maven com.linecorp.centraldogma:centraldogma-server-auth-shiro: check the installed version with your package manager.

## Supported action
Upgrade each affected component to a fixed version on its release line. For a transitive dependency, upgrade the parent package or add an override or constraint, then regenerate the lockfile. Redeploy every environment that ran an affected version.

## Required regression checks
- Run the test suite and a production build.
- Exercise the features that depend on com.linecorp.centraldogma:centraldogma-server-auth-shiro.
- Repeat the inspection and confirm that only fixed versions remain installed.

## Rollback considerations
- Keep the previous lockfile and deployment artifact. Rolling back reinstates the vulnerable version, so apply any documented mitigation while you fix forward.

## Unresolved questions
- Which deployments run an affected version?
- Exploitation status can change. Check again before lowering the priority.
- Mark the work resolved only after the fixed version is verified in production.

## Sources
- Verified: https://osv.dev/vulnerability/GHSA-98q5-5qh2-7w75 (OSV record GHSA-98q5-5qh2-7w75 lists affected ranges: Maven com.linecorp.centraldogma:centraldogma-server-auth-shiro >=0 <0.84.0 (fixed))
- Verified: https://github.com/advisories/GHSA-98q5-5qh2-7w75 (GitHub-reviewed advisory GHSA-98q5-5qh2-7w75 lists affected ranges: Maven com.linecorp.centraldogma:centraldogma-server-auth-shiro >=0 <0.84.0)

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