A improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 5.0.0…
- Exploited
- No known exploitation
- Fix
- No fix listed
- Who is exposed
- Not reported
- Last modified
- Whether it needs action now or is a reference record, by fixed rules, with why. Last checked is when cve.now last re-read it.What do these mean? →
- Reference
- Last checked
- A 0-100 score for how much a CVE matters across the industry: exploitation, exposure, how widely the software is used, severity and whether a fix exists.What do these mean? →
- 34/100 · provisional
- Whether working attack code is public (Exploit-DB, Metasploit, Nuclei or GitHub). Public code makes attacks easier.What do these mean? →
- None on Exploit-DB, Metasploit or GitHub
Summary
A improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 5.0.0 through 5.0.5, FortiSandbox 4.4.0 through 4.4.8, FortiSandbox Cloud 5.0.4 through 5.0.5, FortiSandbox PaaS 5.0.4 through 5.0.5 may allow an unauthenticated attacker to perform an XSS attack via social engineering and crafted HTTP requests.
cve.now Index
- Exploitation?/40Unknown. No CISA SSVC exploitation rating yet
- Exposure7/25Reachable over the network without a login · Unknown: No advisory context yet
- Reach14/20Affects Fortinet (an enterprise product or network appliance)
- Severity7.9/10CVSS 7.9
- No patch5/5No patch listed yet
What would change the score
- Would score about 89 if added to CISA KEV
- Would score about 84 if CISA's SSVC rates exploitation active
- Would score about 49 if advisories confirm default setups are exposed
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Check whether my systems are affected by CVE-2026-26248 (A improper neutralization of input during web page generation ('cross-site scripting') vulnerability in Fortinet FortiSandbox 5.0.0…), using the cve.now data below.
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What cve.now has for CVE-2026-26248 (entry last updated 2026-11-10):
Affected:
- Fortinet FortiSandbox: from 5.0.0, through 5.0.5; from 4.4.0, through 4.4.8; from 4.2.1, through 4.2.8
- Fortinet FortiSandbox Cloud: from 5.0.4, through 5.0.5
- Fortinet FortiSandbox PaaS: from 5.0.4, through 5.0.5
Fixed versions: none listed yet.
Setup: unknown whether the bug needs a non-default feature or setting. Check the advisory.
CISA KEV: CVE-2026-26248 is not listed as of cve.now's last read.
This KEV status is for CVE-2026-26248 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-26-142
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-2026-26248
For follow-up questions, use the cve.now MCP server at https://mcp.cve.now/mcp (no authentication), for example get_vulnerability with id CVE-2026-26248.Timeline
- CVE published
- First seen by cve.now
- Posted on X by cve.now
Affected versions
- Fortinet FortiSandbox
From 5.0.0 · through 5.0.5; From 4.4.0 · through 4.4.8; From 4.2.1 · through 4.2.8
- Fortinet FortiSandbox Cloud
From 5.0.4 · through 5.0.5
- Fortinet FortiSandbox PaaS
From 5.0.4 · through 5.0.5
Evidence 3
Vendor advisory · 1
Establishes: Affected and fixed versions.
- Link
CVE record · 2
Establishes: The identifier and description.
- Record
- Record
Corrections
None so far.
Something wrong on this page? Report an error. Every fix is listed here.
Questions about CVE-2026-26248
Is CVE-2026-26248 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
Which versions are affected by CVE-2026-26248?
FortiSandbox: from 5.0.0 through 5.0.5; from 4.4.0 through 4.4.8; from 4.2.1 through 4.2.8. FortiSandbox Cloud: from 5.0.4 through 5.0.5. FortiSandbox PaaS: from 5.0.4 through 5.0.5.Source: cve.now feed data