---
id: CVE-2026-53499
title: >-
  FORT Validator is a Resource Public Key Infrastructure (RPKI) relying-party
  validator that produces validated route-origin data
summary: >-
  FORT Validator is a Resource Public Key Infrastructure (RPKI) relying-party
  validator that produces validated route-origin data. FORT Validator versions
  through 1.6.7 contain an origin-validation error in their RRDP processing: a
  delegat…
severity: high
cvss: 7.2
cvssVector: 'CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:H'
cwe:
  - CWE-346
vendor: NICMx
product: FORT-validator
affected:
  - FORT-validator < 1.6.8
published: '2026-08-21'
updated: '2026-09-09'
sourceUpdated: '2026-09-09T21:06:39.057'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-53499'
references:
  - url: >-
      https://github.com/NICMx/FORT-validator/security/advisories/GHSA-qfm3-577x-rh54
    label: security-advisories@github.com
tags:
  - nvd
  - cve.org
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-08-25T18:32:25.695778Z'
cvssSource: cna
ingestedAt: '2026-09-13T11:47:27.053Z'
epss: 0.00198
epssPercentile: 0.08557
---

## Overview

FORT Validator is a Resource Public Key Infrastructure (RPKI) relying-party validator that produces validated route-origin data. FORT Validator versions through 1.6.7 contain an origin-validation error in their RRDP processing: a delegated CA under the same Trust Anchor Locator (TAL) can reference a victim CA’s public RRDP notification and snapshot URLs, causing FORT’s URL-based download cache to report success after deleting the victim’s local snapshot. Following a routine victim publication, this can silently remove the victim’s VRPs and other signed objects from FORT’s output, potentially enabling route hijacking or loss of reachability. Version 1.6.8 contains a patch that rejects cross-origin RRDP snapshot and delta URLs; as a workaround, administrators can disable HTTP/RRDP with  --http.enabled=false  while keeping rsync enabled, although this can leave data unavailable or stale where rsync is not supported.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.