# CVE-2026-126254: CVE-2026-126254

Status: published. Published: 2026-11-11. Updated: 2026-11-11.

A numeric truncation error vulnerability in Fortinet FortiOS 8.0.0 through 8.0.1, FortiOS 7.6.0 through 7.6.7, FortiOS 7.4.0 through 7.4.12, FortiOS 7.2.0 through 7.2.13 may allow a configured ibgp neighbor to send malicious/malformed attributes to all connected routers via a specially crafted request

## Remediation

- fix: Upgrade to FortiOS version 8.0.2 or above
Upgrade to FortiOS version 7.6.8 or above
Upgrade to FortiOS version 7.4.13 or above
Upgrade to FortiOS version 7.2.14 or above (source: CNA: fortinet)

## Affected products and versions

- Fortinet / FortiOS: ≥ 8.0.0; ≤ 8.0.1 (affected, semver); ≥ 7.6.0; ≤ 7.6.7 (affected, semver); ≥ 7.4.0; ≤ 7.4.12 (affected, semver); ≥ 7.2.0; ≤ 7.2.13 (affected, semver). Source: CNA: fortinet

## Severity and prioritization

- CVSS 3.1: 9.6 (critical); CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:C/C:N/I:H/A:H/E:F/RL:O/RC:C; source: CNA: fortinet

- CISA KEV: No listing in collected sources

- EPSS: Not available

- SSVC: Not available

- Weaknesses: CWE-197

## Exploit evidence

No exploit evidence in collected sources. This is not proof of no exploitation.

## References

- https://fortiguard.fortinet.com/psirt/FG-IR-26-268 (CNA: fortinet)

## Provenance

- CNA: fortinet: https://www.cve.org/CVERecord?id=CVE-2026-126254; retrieved 2026-11-11; source updated 2026-11-11

Revision: 7f0b2c4dea333741bb61bf8ef2274858016db7c56fa032629657492ba3e95d5a

Canonical: https://y2.dev/cve/CVE-2026-126254

## Agent and API access

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- Cyber API: https://api.y2.dev/api/v2/cyber/cves and https://api.y2.dev/api/v2/cyber/cves/{cveId}.

- Y2 Pro or Elite: create a workspace API key with the intel:cyber scope and send Authorization: Bearer <Y2_API_KEY>. Setup: https://y2.dev/docs/api/create-key.

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- OpenAPI: https://y2.dev/api/openapi.yaml. Agent access metadata: https://y2.dev/cve/agent.json.

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