CVE-2026-53499Public exploitNetwork attack vector

Route-origin suppression via RRDP cache poisoning

Published Aug 21, 2026 · Updated Aug 21, 2026

Origin validation error in FORT Validator before 1.6.8 allows remote authenticated users to suppress a victim CA's route-origin data. The URL-only cache memoization returns success without checking whether delete_rpp() removed the snapshot, so the victim workspace fails to rebuild. Reachability requires a delegated CA under the same TAL and a routine victim publication; lost VRPs can enable route hijacking or loss of reachability.

CVSS severity7.2
High
EPSS probability0.16%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Origin validation error in FORT Validator before 1.6.8 allows remote authenticated users to suppress a victim CA's route-origin data. The URL-only cache memoization returns success without checking whether delete_rpp() removed the snapshot, so the victim workspace fails to rebuild. Reachability requires a delegated CA under the same TAL and a routine victim publication; lost VRPs can enable route hijacking or loss of reachability.

The record

CVE
CVE-2026-53499
Published
Aug 21, 2026
Updated
Aug 21, 2026
Vendor
FORT Validator Project
Product
FORT Validator
Classifications
CWE-346, T1565.001
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Aug 21, 2026CVE publishedPublication date reported by the CVE source.
  2. Aug 21, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=< 1.6.8

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

FORT Validator Project · FORT Validatorversion=< 1.6.8

Published CVSS scores

7.2GitHub CNACVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:H/VA:L/SC:N/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitPublished

Weakness, pattern, technique

CWE-346Origin Validation Error
T1565.001Stored Data Manipulation

Public exploit references

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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