Cache modification via unchecked rsync module traversal
Published Jun 8, 2026 · Updated Jun 8, 2026
Path traversal in NLnet Labs Routinator 0.15.1 and earlier allows remote attackers to modify its rsync cache via a rogue rsync URI. The rsync URI parser rejects empty and dot-only path components but fails to apply the same validation to the module component used to construct cache file-system paths. Reachability requires Routinator to process an attacker-controlled repository URI, after which traversal can corrupt cached RPKI data and interrupt or alter validation results.
Summary
What happened
Path traversal in NLnet Labs Routinator 0.15.1 and earlier allows remote attackers to modify its rsync cache via a rogue rsync URI. The rsync URI parser rejects empty and dot-only path components but fails to apply the same validation to the module component used to construct cache file-system paths. Reachability requires Routinator to process an attacker-controlled repository URI, after which traversal can corrupt cached RPKI data and interrupt or alter validation results.
The record
- CVE
- CVE-2026-49233
- Published
- Jun 8, 2026
- Updated
- Jun 8, 2026
- Vendor
- NLnet Labs
- Product
- Routinator
- Classifications
- CWE-22, T1565.001
- Attack vector
- network
- Privileges
- unauthenticated
Timeline
How it unfolded
- Jun 8, 2026CVE publishedPublication date reported by the CVE source.
- Jun 8, 2026Record updatedLatest update available in the CVE record.
Exploitability
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Attacks
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