CVE-2026-9177

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

Published Jul 29, 2026 CVSS 4.0 · 9.4 Critical EPSS < 1% KEV · Not listed
Description
A Server-Side Template Injection (SSTI) vulnerability was identified
in the mail template functionality of the Axway SecureTransport product in version 5.5-20260326. This
flaw
allows an attacker with admin privileges to inject arbitrary Java code expressions, which are
executed server-side when the template is rendered (i.e., during email
sending). Successful exploitation of this flaw allows an attacker to
execute
arbitrary code on the server that results in full host compromise.



This issue affects all Axway SecureTransport versions prior 5.5-20260528 update.

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Axway
Axway securetransport
Vendors & Products Axway
Axway securetransport
Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description A Server-Side Template Injection (SSTI) vulnerability was identified in the mail template functionality of the Axway SecureTransport product in version 5.5-20260326. This flaw allows an attacker with admin privileges to inject arbitrary Java code expressions, which are executed server-side when the template is rendered (i.e., during email sending). Successful exploitation of this flaw allows an attacker to execute arbitrary code on the server that results in full host compromise. This issue affects all Axway SecureTransport versions prior 5.5-20260528 update.
Title Server-Side Template Injection in SecureTransport's Apache Velocity mail templates
Weaknesses CWE-1336
References
Metrics cvssV4_0

{'score': 9.4, 'vector': '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'}

Weaknesses

Sources

Status
PUBLISHED
Assigner
Toreon
Published
Updated
Jul 31, 2026, 5:52 AM
Reserved
May 21, 2026, 2:43 PM
Status
Awaiting Analysis
Published
Jul 29, 2026, 2:16 PM
Modified
Oct 23, 2026, 11:10 PM