SEPTEMBER 19, 2026
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Case File

CVE-2026-53499

HIGH · CVSS 7.2 EPSS 0.16% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-21 · Last synced 2026-09-18

CyberRota Analysis

AI-Generated

FORT Validator versions up to 1.6.7 are vulnerable to an origin-validation error in RRDP processing, allowing a delegated CA to manipulate public RRDP notification URLs and inadvertently delete a victim CA's validated route-origin data. This flaw can lead to route hijacking or loss of network reachability, posing significant risks to network integrity. Organizations utilizing FORT Validator should prioritize upgrading to version 1.6.8 or implementing the recommended workaround to mitigate potential impacts.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-53499
Severity
HIGH
CVSS
7.2
EPSS
0.16%

Original NVD Description

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.