Risk Letters

Exploited vulnerability

CVE-2026-44373

TLP:CLEAR

nitro nitro Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal')

Nitro is a next generation server toolkit. Prior to 3.0.260429-beta, an attacker could bypass a proxy route rule by sending percent-encoded path traversal (..%2f) in the URL, causing Nitro to forward a request that the upstream resolved outside the configured scope. This vulnerability is fixed in 3.0.260429-beta.

Facts

  • Vendor: nitro
  • Product: nitro
  • EPSS (probability of exploitation within 30 days): 0.5 %
  • First known exploitation: 21 October 2026
  • First seen by Risk Letters: 21 October 2026

Members see which Nordic sectors the flaw hits, and what to do about it.

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Data: NVD (public domain), CISA KEV, FIRST EPSS, MITRE ATT&CK, AlienVault OTX. NVD