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A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiAnalyzer 8.0.0…

Affects FortiAnalyzer, FortiManager, and their Cloud versions in the 7.2, 7.4, 7.6, and 8.0 ranges when the JSON API is enabled on an admin profile. The advisory says to upgrade to 8.0.2 or above.

CVE-2026-126236EUVD-2026-123887

Written by anthropic/claude-haiku-5.5 from the sources below. Verify against them.

7.2HighCNA
Exploited
No known exploitation
Fix
See vendor advisory
Who is exposed
Specific setups only

Do first: Check whether your setup matches what the bug needs. The JSON API must be enabled on the admin profile (it is disabled by default). Affected FortiManager, FortiAnalyzer, and their Cloud versions in the listed 8.0, 7.6, 7.4 and 7.2 ranges.

Published
Last modified
Reference
Last checked
34/100 · provisional
Specific setups only
None on Exploit-DB, Metasploit or GitHub

Summary

A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiAnalyzer 8.0.0 through 8.0.1, FortiAnalyzer 7.6.0 through 7.6.7, FortiAnalyzer 7.4.0 through 7.4.11, FortiAnalyzer 7.2.0 through 7.2.12, FortiAnalyzer Cloud 8.0.1, FortiAnalyzer Cloud 7.6.0 through 7.6.7, FortiAnalyzer Cloud 7.4.1 through 7.4.11, FortiAnalyzer Cloud 7.2.1 through 7.2.12, FortiManager 8.0.0 through 8.0.1, FortiManager 7.6.0 through 7.6.7, FortiManager 7.4.0 through 7.4.11, FortiManager 7.2.0 through 7.2.12, FortiManager Cloud 8.0.1, FortiManager Cloud 7.6.0 through 7.6.7, FortiManager Cloud 7.4.1 through 7.4.11, FortiManager Cloud 7.2.1 through 7.2.12 may allow an authenticated attacker to execute unauthorized code or commands via specially crafted HTTP requests

Who should check

Teams running FortiManager or FortiAnalyzer, on-prem or Cloud, in the 7.2 to 8.0 branches, and any admin profiles with the JSON API enabled.

Read the source excerpt

“in FortiManager, FortiAnalyzer, FortiManager Cloud, FortiAnalyzer Cloud, FortiSASE-Sovereign GUI”

fortiguard.fortinet.com

cve.now Index

34Pcve.now Index 34 of 100 · methodology v3 · provisional
  • Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
  • Exposure8/25Specific setups only, reachable over the network
  • Reach14/20Affects Fortinet (an enterprise product or network appliance)
  • Severity7.2/10CVSS 7.2
  • No patch5/5No fixed version listed; see vendor advisory

What would change the score

  • Would score about 84 if added to CISA KEV
  • Would score about 79 if CISA's SSVC rates exploitation active
  • Would score about 41 if CISA's SSVC rates it automatable

What to do

  • Check whether your setup matches what the bug needs.

    The JSON API must be enabled on the admin profile (it is disabled by default). Affected FortiManager, FortiAnalyzer, and their Cloud versions in the listed 8.0, 7.6, 7.4 and 7.2 ranges.
  • Workaround: Set rpc-permit to none on admin profiles that have the JSON API enabled.

Check your systems with an agent

Paste this into a coding or ops agent. It checks your systems read-only and reports a table per asset.

Check whether my systems are affected by CVE-2026-126236 (A improper neutralization of special elements used in an os command ('os command injection') vulnerability in Fortinet FortiAnalyzer 8.0.0…), using the cve.now data below.

Rules: work read-only. Do not run exploit code, proof-of-concept scripts or scanners that send attack payloads, and do not change any configuration, package, image or deployment. Report findings only.

What cve.now has for CVE-2026-126236 (entry last updated 2026-11-11):
Affected:
- Fortinet FortiManager: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11; from 7.2.0, through 7.2.12
- Fortinet FortiAnalyzer: from 8.0.0, through 8.0.1; from 7.6.0, through 7.6.7; from 7.4.0, through 7.4.11; from 7.2.0, through 7.2.12
- Fortinet FortiManager Cloud: from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11; from 7.2.1, through 7.2.12
- Fortinet FortiAnalyzer Cloud: from 7.6.0, through 7.6.7; from 7.4.1, through 7.4.11; from 7.2.1, through 7.2.12
Fixed versions: none listed yet.
Conditions (all must be true for the bug to be hit):
- The JSON API must be enabled on the admin profile (it is disabled by default). (source: https://fortiguard.fortinet.com/psirt/FG-IR-26-251)
- Affected FortiManager, FortiAnalyzer, and their Cloud versions in the listed 8.0, 7.6, 7.4 and 7.2 ranges. (source: https://fortiguard.fortinet.com/psirt/FG-IR-26-251)
Setup: the bug needs a feature or setting that is off by default or uncommon. Check whether each asset has it on.
Attacker needs: network access, high-privilege login, no user action.
Workaround: Set rpc-permit to none on admin profiles that have the JSON API enabled. (source: https://fortiguard.fortinet.com/psirt/FG-IR-26-251)
CISA KEV: CVE-2026-126236 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-126236 only. If you also check another CVE, look up its own KEV status; never assume it from this one.

How to check:
- Installed software: check what is actually running, not what a repo declares. Read the version from each host, container image and Kubernetes node (the binary's version output, the OS package database, image layers), and check whether the conditions above hold there. Distribution packages may carry a backported fix under an older version number; confirm against the distribution's own advisory.

Verify against the linked advisories before concluding, and cite the date you read each one:
- https://fortiguard.fortinet.com/psirt/FG-IR-26-251
Do not conclude an asset is unaffected unless you checked it and the evidence covers both its version and the conditions above. If you could not check something, mark it unknown and say what is missing.

Report a table with one row per asset and these columns: Asset | Version or build | Status (affected, fixed, not applicable, unknown) | Compensating controls | Exposure (internet-facing, internal, none) | Evidence | Next action.

Entry: https://cve.now/CVE-2026-126236
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example execute with name cve.get and arguments {"id": "CVE-2026-126236"}.

Timeline

  1. CVE published
  2. First seen by cve.now

Affected versions

  • Fortinet FortiManager

    From 8.0.0 · through 8.0.1; From 7.6.0 · through 7.6.7; From 7.4.0 · through 7.4.11; From 7.2.0 · through 7.2.12

  • Fortinet FortiAnalyzer

    From 8.0.0 · through 8.0.1; From 7.6.0 · through 7.6.7; From 7.4.0 · through 7.4.11; From 7.2.0 · through 7.2.12

  • Fortinet FortiManager Cloud

    From 7.6.0 · through 7.6.7; From 7.4.1 · through 7.4.11; From 7.2.1 · through 7.2.12

  • Fortinet FortiAnalyzer Cloud

    From 7.6.0 · through 7.6.7; From 7.4.1 · through 7.4.11; From 7.2.1 · through 7.2.12

Evidence 3

Vendor advisory · 1

Establishes: Affected and fixed versions.

  1. Link

CVE record · 2

Establishes: The identifier and description.

  1. Record
  2. Record

Corrections

None so far.

Something wrong on this page? Report an error. Every fix is listed here.

Questions about CVE-2026-126236

Is CVE-2026-126236 being exploited?

It is not in CISA's Known Exploited Vulnerabilities catalog, and CISA's SSVC assessment does not mark exploitation as active. That does not mean it has not been attacked: vendors and researchers can report attacks before CISA lists them. No public exploit code is tracked.Source: cve.now feed data

What does this mean?

An authenticated attacker may be able to run unauthorized code or commands on the device by sending specially crafted HTTP requests. The flaw is an OS command injection weakness.Source: fortiguard.fortinet.com

Which versions are affected by CVE-2026-126236?

FortiManager: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.0 through 7.4.11; from 7.2.0 through 7.2.12. FortiAnalyzer: from 8.0.0 through 8.0.1; from 7.6.0 through 7.6.7; from 7.4.0 through 7.4.11; from 7.2.0 through 7.2.12. FortiManager Cloud: from 7.6.0 through 7.6.7; from 7.4.1 through 7.4.11; from 7.2.1 through 7.2.12. FortiAnalyzer Cloud: from 7.6.0 through 7.6.7; from 7.4.1 through 7.4.11; from 7.2.1 through 7.2.12.Source: cve.now feed data

Am I affected, and how do I check?

The listed ranges are FortiAnalyzer and FortiManager 8.0.0 to 8.0.1, 7.6.0 to 7.6.7, 7.4.0 to 7.4.11, and 7.2.0 to 7.2.12, plus the matching Cloud ranges. The bug is reachable only when the JSON API is enabled on an admin profile, which is off by default. To check, look at the running firmware version and the JSON API setting on each admin profile.Source: fortiguard.fortinet.com

How do I fix CVE-2026-126236?

The advisory says to upgrade to 8.0.2 or above. Affected versions in the other listed branches need to be moved to a fixed release for that branch as the vendor publishes it.Source: fortiguard.fortinet.com

What if there's no patch?

Set rpc-permit to none on any admin profile that has the JSON API enabled. This blocks the affected path until the device can be upgraded.Source: fortiguard.fortinet.com