UBUNTU-CVE-2026-53499

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Source
https://ubuntu.com/security/CVE-2026-53499
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53499.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-53499
Upstream
Published
2026-08-21T23:16:00Z
Modified
2026-09-02T19:36:20.077242989Z
Severity
  • 7.2 (High) CVSS_V4 - 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 CVSS Calculator
  • Ubuntu - medium
Summary
[none]
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.

References

Affected packages

Ubuntu:Pro:20.04:LTS / fort-validator

Package

Name
fort-validator
Purl
pkg:deb/ubuntu/fort-validator?arch=source&distro=esm-apps%2Ffocal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.1.1-2
1.1.2-1
1.1.3-1
1.2.0-1
1.2.0-1ubuntu0.1~esm1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.2.0-1ubuntu0.1~esm1",
            "binary_name": "fort-validator"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53499.json"

Ubuntu:22.04:LTS / fort-validator

Package

Name
fort-validator
Purl
pkg:deb/ubuntu/fort-validator?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.5.1-1
1.5.2-1
1.5.3-1
1.5.3-1build1
1.5.3-1ubuntu0.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.5.3-1ubuntu0.1",
            "binary_name": "fort-validator"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53499.json"

Ubuntu:Pro:24.04:LTS / fort-validator

Package

Name
fort-validator
Purl
pkg:deb/ubuntu/fort-validator?arch=source&distro=esm-apps%2Fnoble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.5.4-1
1.6.1-1
1.6.1-1build2
1.6.1-1build3
1.6.1-1ubuntu0.1~esm2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.1-1ubuntu0.1~esm2",
            "binary_name": "fort-validator"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53499.json"

Ubuntu:26.04:LTS / fort-validator

Package

Name
fort-validator
Purl
pkg:deb/ubuntu/fort-validator?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0Unknown introduced version / All previous versions are affected

Affected versions

1.*
1.6.6-1build1
1.6.7-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_version": "1.6.7-1",
            "binary_name": "fort-validator"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-53499.json"