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CVE-2026-49833 is a path traversal vulnerability in DSpace's COAR Notify / Linked Data Notifications (LDN) message generation. The flaw allows an authenticated DSpace administrator to reference files outside the intended trusted template directory during LDN template handling. Because the referenced file is processed as an Apache Velocity template, the issue can lead not only to arbitrary file read and information disclosure, but also, in demonstrated attack chains, arbitrary Java code execution through unsafe interpretation of attacker-controlled or attacker-selected template content by the Velocity engine.
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What it means. What to do now. Patch path, mitigations, and the assume-compromise checklist.
What an attacker gets, and what they’ve been doing with it.
If you can’t patch tonight, do this now.
ldn.enabled=false in dspace.cfg or local.cfg. LDN is disabled by default. In environments using a manual patching workflow, keep LDN disabled until the patch or upgrade has been fully applied and the service restarted; re-enable only if operationally necessary afterward.Patch, then assume compromise.
No public exploits tracked yet. Mallory keeps watching.
No public exploit code observed for this vulnerability.
No public activity tracked yet. Mallory keeps watching.
No public activity observed for this vulnerability.
Query your assets running an affected version, and investigate the blast radius.
Every observed campaign linking this CVE to a named adversary.
Malware families riding this exploit, with evidence and IOCs.
YARA, Sigma, Snort, and vendor rules, auto-deployed to your SIEM.
Cross-references every affected SKU, including bundled OEM variants.
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