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TI-2017-02408 Aliases CVE-2017-3203GHSA-8v4h-j42h-wfhc

Pivotal/Spring Spring-flex's Action Message Format (AMF3) Java implementation is vulnerable to insecure deserialization

Priority MEDIUM 44CWE-502Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
High
Impact type
Code execution
Confidentiality · integrity · availability
High · High · High
Fix status
No fix listed

Attack profile from CVSS 3.0 · NVD. Fix status from CNA and GitHub. Impact type from CWE-502.

Summary

The Java implementations of AMF3 deserializers in Pivotal/Spring Spring-flex derive class instances from java.io.Externalizable rather than the AMF3 specification's recommendation of flash.utils.IExternalizable. A remote attacker with the ability to spoof or control an RMI server connection may be able to send serialized Java objects that execute arbitrary code when deserialized.

Why it matters now

EPSS 0.06229 93rd percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix No fix listed No fixed version in the sources yet

SSVC decision points

Not available: CISA has not published SSVC decision points for this record.

Affected products

VendorProductAffected versionsFixed inStatusSource
Pivotal/SpringSpring-flexall versions—No fix listedCNA
—org.springframework.flex:spring-flex (Maven)up to 1.5.2.RELEASE—No fix listedGHSA-8v4h-j42h-wfhc
  • Spring-flex VendorPivotal/Spring Affected all versions Fixed in — No fix listed CNA
  • org.springframework.flex:spring-flex (Maven) Vendor— Affected up to 1.5.2.RELEASE Fixed in — No fix listed GHSA-8v4h-j42h-wfhc

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:pivotal:spring-flex:*:*:*:*:*:*:*:*all versionsVulnerablePivotal
  • cpe:2.3:a:pivotal:spring-flex:*:*:*:*:*:*:*:* Versions all versions Vulnerable ·Pivotal

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2017-3203
  2. 2026-10-03 Alias added: GHSA-8v4h-j42h-wfhc

References

Exploit 1

Advisory 3

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences