{"id":"DEBIAN-CVE-2026-53499","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.","modified":"2026-09-10T08:47:31.615030684Z","published":"2026-08-21T23:16:26.070Z","upstream":["CVE-2026-53499"],"references":[{"type":"ADVISORY","url":"https://security-tracker.debian.org/tracker/CVE-2026-53499"}],"affected":[{"package":{"name":"fort-validator","ecosystem":"Debian:12","purl":"pkg:deb/debian/fort-validator?arch=source&distro=bookworm"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}],"versions":["1.5.4-1","1.5.4-1+deb12u1","1.6.1-1","1.6.1-1~bpo12+2","1.6.2-1","1.6.3-1","1.6.3-1~bpo12+1","1.6.4+20240930-1","1.6.4+20240930-1~bpo12+1","1.6.5-1","1.6.6-1","1.6.6-1~bpo12+1","1.6.7-1","1.6.7-1~bpo13+1","1.6.8-1","1.7.0.experimental-1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53499.json"}},{"package":{"name":"fort-validator","ecosystem":"Debian:13","purl":"pkg:deb/debian/fort-validator?arch=source&distro=trixie"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.8-0+deb13u1"}]}],"versions":["1.6.6-1","1.6.7-1","1.6.7-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2026-53499.json"}},{"package":{"name":"fort-validator","ecosystem":"Debian:14","purl":"pkg:deb/debian/fort-validator?arch=source&distro=forky"},"ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"1.6.8-1"}]}],"versions":["1.6.6-1","1.6.7-1","1.6.7-1~bpo13+1"],"ecosystem_specific":{"urgency":"not yet assigned"},"database_specific":{"source":"https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X"}]}