CVE-2026-109200 LogicalDOC CVE debrief

Who should care

Defenders responsible for LogicalDOC Community Edition deployments, particularly those using version 9.3, should assess exposure and verify the feasibility of internal server requests via XMLConverter.

Why it matters

Defenders should prioritize verifying exposure of LogicalDOC Community Edition version 9.3 and assessing the feasibility of internal server requests via XMLConverter to prevent potential unauthorized requests and application of attacker-controlled XSLT.

• Potential for unauthorized internal server requests
• Possible application of attacker-controlled XSLT during conversion
• Need for verification of exposure and internal server request feasibility
• Requirement for restricting XMLConverter access and validating XML documents

Technical summary

The XMLConverter in LogicalDOC Community Edition through 9.3 fetches xml-stylesheet href URLs without scheme or host allowlisting, allowing authenticated users to upload XML documents that force server requests and apply attacker-controlled XSLT during conversion. This vulnerability can lead to unauthorized internal server requests and potential application of malicious XSLT, emphasizing the need for defenders to verify exposure and assess internal server request feasibility via XMLConverter to prevent potential security breaches.

Defensive priority

Defenders should prioritize verifying exposure of LogicalDOC Community Edition version 9.3 and assessing the feasibility of internal server requests via XMLConverter.

Recommended defensive actions

• Verify exposure of LogicalDOC Community Edition version 9.3
• Assess the feasibility of internal server requests via XMLConverter
• Restrict XMLConverter access to trusted users and validate XML documents
• Implement scheme and host allowlisting for xml-stylesheet href URLs
• Review compensating controls for exposed systems while remediation is scheduled and verified
• Check relevant monitoring, detection, and logs for exposed assets that need extra review
• Track exceptions, retest remediated assets, and close the item only after evidence is documented.

Evidence notes

The CVE record and source item provide details on the vulnerability in LogicalDOC Community Edition through 9.3. The XMLConverter fetches xml-stylesheet href URLs without scheme or host allowlisting, allowing authenticated users to force server requests and apply attacker-controlled XSLT during conversion.

Sources and references

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.