CVE-2026-53499
HighCVSS 7.2Exploitation Probability (EPSS)
Low risk9th percentile - higher than 9% of all known CVEs
Summary
FORT Validator versions through 1.6.7 contain an origin-validation error in RRDP processing: a delegated CA under the same 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. 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.
Risk Assessment
The vulnerability could allow an attacker to manipulate routing data, potentially leading to traffic hijacking or service unavailability.
Recommendation
Upgrade FORT Validator to version 1.6.8 or later. If not possible, disable HTTP/RRDP with --http.enabled=false, noting rsync limitations.
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Original NVD description (English source)
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.
Vulnerability data from NVD (NIST) · CISA KEV · EPSS