Merges the distributed per-host results into one file.
Detect
Confirms the host is NetScaler, reads the version, and flags builds in the CVE-2026-8452 Heap Overflow range. Read-only GETs. Does not exploit.
Report
Counts checked, product, and affected.
Targets
Hosts, IPs, or URLs, one per line. Empty input uses localhost.
Overview
CVE-2026-8452 is a heap overflow in Citrix NetScaler ADC and Gateway SAML signature canonicalization. watchTowr disclosed it in August 2026. An unauthenticated attacker can corrupt packet-engine state when the appliance is a SAML SP or IdP. You point this workflow at hostnames, IP addresses, or URLs you are authorised to test. It fingerprints the public page (title match on NetScaler), reads the version from / with a fallback to the root body, and compares that number to the range table in the graph. You get an affected or not row per host, so a fleet advisory becomes an evidenced list for exposure management.
The graph has no confirm node. Confirming a heap overflow would crash the appliance or be RCE, and there is no non-intrusive probe. Detection stays fingerprint plus version. A flagged row is patch-lag, not proof the overflow ran. This page is a standalone check, not part of the KEV Collection, because CISA had not listed the ID on KEV when the workflow shipped.
Run it on a schedule when the estate changes. New hosts and delayed patch windows are the reason the same check is worth more the second week than the first.
Pipeline
Read the target list. Hosts, URLs, or ranges, one per line, become the scope.
Fingerprint each host as Citrix NetScaler ADC and Gateway from the public page title, then GET / and parse the version. A host counts as affected only when the fingerprint matches and the version is inside the encoded range.
Collect the per-host rows: product match, version read, affected flag, and any fetch error.
Emit the summary counts: hosts checked, product hits, affected, and errors.
Inputs
Target list. Hostnames, IP addresses, CIDR ranges, or URLs, one per line. JSONL with a url field also works. Point it at scope you are authorised to test. The check only sends read-only GET requests.
Outputs
results.jsonl. One row per host: URL, whether Citrix NetScaler ADC and Gateway was detected, the version read, and the affected flag.
summary.json. Counts across the list: targets, product hits, affected, and errors.
Integrations
HTTP. Unauthenticated GET to the product root and /. No login, no exploit payload, no confirm probe.
Sample output
The records below are illustrative and do not come from a real run. They show one Citrix NetScaler ADC and Gateway host inside the CVE-2026-8452 range, one patched host, and one host that is not the product.
Which Citrix NetScaler ADC and Gateway versions does this flag?
14.1 before 14.1-72.61, and 13.1 before 13.1-63.18. 14.1-72.61 and 13.1-63.18 or later on those lines is the floor the graph treats as not affected. The compare uses the version the product itself served.
Why is there no confirm step?
CVE-2026-8452 is a heap overflow. There is no non-intrusive probe. A confirm would crash the packet engine or execute code. The DAG stays targets, check, collect, summary.
Does a flagged host mean CVE-2026-8452 was exploited?
No. A flagged row is patch-lag against the range table. The run does not exercise the heap overflow. Treat it as a patching signal.
Is this check safe on production?
Yes. It only sends read-only GET requests to the login or version endpoint. It does not log in and it does not send an exploit.
Does the check need credentials?
No. It fingerprints the public page and reads / the way an external scanner would.