{"id":"CVE-2026-53499","summary":"FORT-validator Vulnerable to RRDP Shared Snapshot Cache Poisoning","details":"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.","aliases":["GHSA-qfm3-577x-rh54"],"modified":"2026-09-11T03:30:39.084497035Z","published":"2026-08-21T22:29:48.970Z","database_specific":{"cna_assigner":"GitHub_M","cwe_ids":["CWE-346"],"osv_generated_from":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53499.json"},"references":[{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/53xxx/CVE-2026-53499.json"},{"type":"ADVISORY","url":"https://github.com/NICMx/FORT-validator/security/advisories/GHSA-qfm3-577x-rh54"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-53499"}],"affected":[{"ranges":[{"type":"GIT","repo":"https://github.com/nicmx/fort-validator","events":[{"introduced":"0"},{"fixed":"6716855f1cb2479e709039429e56d51ee3bdca3d"}],"database_specific":{"source":["AFFECTED_FIELD","DESCRIPTION"],"extracted_events":[{"introduced":"0"},{"fixed":"1.6.8"},{"fixed":"1.6.7"}]}}],"versions":["1.6.7","1.6.6","1.6.5","1.6.4","1.6.3","1.6.2","1.6.1","1.6.0","1.5.4","1.5.3","v1.5.1","v1.5.0","v1.4.0","v1.3.0","v1.2.1","v1.2.0","v1.1.1","v1.1.0","v1.0.0","v0.0.2"],"database_specific":{"source":"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-53499.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V4","score":"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"}]}