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Tableau Unaffected by Apache Log4j CVEs (CVE-2025-68161, CVE-2026-34477, CVE-2026-34478, CVE-2026-34480)

公開日: Jul 8, 2026
説明
Vulnerability scanners may flag the following Apache Log4j JAR files bundled with Tableau Desktop, Tableau Prep Builder, and Tableau Bridge:

  • oauthservice.jar — located at C:\Program Files\Tableau\Tableau <version>\bin\
  • loom-rest-api-1.0-SNAPSHOT.jar
  • jdbcserver.jar

These JARs contain Log4j Core versions 2.17.2 or 2.24.3. Since customers cannot replace bundled JARs independently, scanners raise these as findings against the following CVEs:

CVE                         Title                                                CVSS           Log4j Versions Affected
CVE-2025-68161    Apache Log4j MitM Vulnerability  HIGH         ≤ 2.24.3
CVE-2026-34477    SSL Hostname Bypass                   HIGH          ≤ 2.25.3
CVE-2026-34478    RFC5424Layout Log Injection       MEDIUM     2.21.0–2.25.3
CVE-2026-34480    XmlLayout Invalid XML Output     HIGH          ≤ 2.25.3

CVE-2025-68161 – Apache Log4j MitM Vulnerability
This vulnerability allows man-in-the-middle (MitM) attacks by exploiting Log4j's SocketAppender or HttpAppender configurations to intercept communications. The scanner flags this based on the Log4j version range alone.

CVE-2026-34477 – SSL Hostname Bypass
This is an incomplete fix for CVE-2025-68161 — SSL hostname verification is only enforced when log4j2.sslVerifyHostName is explicitly enabled, leaving a bypass vector via SocketAppender/HttpAppender.

CVE-2026-34478 – RFC5424Layout Log Injection
Exploits the Rfc5424Layout configuration in Log4j's XML config, enabling CRLF log injection via undocumented renamed security-relevant attributes. The scanner triggers on any log4j-core 2.21.0–2.25.3 installation.

CVE-2026-34480 – XmlLayout Invalid XML Output
XmlLayout in Log4j Core (≤ 2.25.3) fails to sanitize XML 1.0-forbidden characters in log messages, producing invalid XML output that disrupts XML-based integrations.

Affected Products:
  • Tableau Desktop — all current versions
  • Tableau Prep Builder — all current versions
  • Tableau Bridge — all current versions
Note: Tableau Cloud (managed by Salesforce) and Tableau Server follow separate patch cycles and separate CVE assessments. This article covers on-premises client products only.
解決策
All four CVEs are assessed as Not Affected for Tableau Desktop, Tableau Prep Builder, and Tableau Bridge. 

CVE                        Tableau Assessment    Reason
CVE-2025-68161    ✅ Not Affected        Tableau does not configure SocketAppender or HttpAppender in any service or process. The vulnerable code path is not exercised.
CVE-2026-34477    ✅ Not Affected        Same root precondition as CVE-2025-68161 — SocketAppender/HttpAppender not in use. Not affected for the same reason.
CVE-2026-34478    ✅ Not Affected        Tableau does not configure Rfc5424Layout in any service or process in Desktop, Prep Builder, or Bridge. The exploit precondition is absent.
CVE-2026-34480    ✅ Not Affected        Tableau does not configure XmlLayout in any service. No log output passes through the affected code path.

These findings are scanner false positives based solely on Log4j version-range matching. The specific configurations required to make these vulnerabilities exploitable are not present in any standard Tableau deployment. No customer-side action or workaround is required.

Log4j 2.25.4 Upgrade Timeline (to fully eliminate scanner findings): 

Product Line            Fix Release                                    Status
Tableau 2025.1.x    July 2026 Maintenance Release    Planned
Tableau 2025.3.x    July 2026 Maintenance Release    Planned
Tableau 2026.2       Released                                       — Log4j 2.25.4 inclusion pending confirmation in release notes    Check https://www.tableau.com/support/releases/desktop/2026.2

We recommend planning an upgrade once the July 2026 MRs are published to fully resolve scanner findings. 

For formal security or compliance documentation, submit a request to: https://security.salesforce.com/contact 

 

 

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