CVE-2026-9177: Axway SecureTransport

Server-Side Template Injection in SecureTransport's Apache Velocity mail templates

CVSS 9.4 CriticalCriticalEPSS 0.0050 · 43rd percentile

Critical, because:

CVSS score 9.4: 9.0 or more.

Published by the CVE Program (CNA: Toreon) at 29 Jul 2026, 13:46 UTC. agentprime has not analysed this yet, so whether it affects any app is not known. This CVE names a vendor and product rather than a package, so the lockfile check doesn’t match it.

Affected products, as the CNA wrote them
Vendor	Product	Versions
Axway	SecureTransport Package name: Apache Velocity	affected 5.5-20260326 to before 5.5-20260528 SecureTransport Other versions: affected

Identifiers

CVE-2026-9177

CNA

Toreon

Weakness (CWE)

CWE-1336

Not analysed yet

We haven’t published our own analysis of this CVE. If a person reviews it, this page will say what’s affected and what has to be true for it to matter.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
9.4	Critical	4.0	CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H	CNA (Toreon)

CISA KEV Not listed.
EPSS 0.0050, the 43rd percentile, on 13 Nov 2026: FIRST’s estimate of the chance of exploitation in the next 30 days.

Timeline

This record came from the full history of the CVE Program, published 29 Jul 2026. New records show when each source confirmed them.

Sources

References from the CNA

support.axway.com/news/4882/lang/en vendor-advisorymitigationpatchcustomer-entitlement
www.toreon.com/CVE-2026-9177 technical-description
docs.hackjiji.org/blog/cve-2026-9177-ssti-in-securetransport-mft-gateway technical-description

Facts on this page come from the CVE List as the CNA published them, with CVSS from the sources named above, CISA KEV and FIRST EPSS. Vendors, products and versions are shown as the CNA wrote them. We don’t reproduce the CVE’s description.