Unsafe Java deserialization in SerializingHttpMessageConverter — remote code execution

Description

SerializingHttpMessageConverter deserializes the body of incoming HTTP requests with a raw java.io.ObjectInputStream and no class filtering. Any request with Content-Type application/x-java-serialized-object whose body resolves to a Serializable type is read directly via readObject(). If an application using this converter on an inbound HTTP endpoint has any known Java deserialization "gadget" on its classpath, a remote, unauthenticated attacker can achieve arbitrary code execution. Spring Integration 7.1.0 Spring Integration 7.0.0 - 7.0.5 Spring Integration 6.5.0 - 6.5.10 Spring Integration 6.4.0 - 6.4.12 Spring Integration 5.5.21 and earlier

Scores

EPSS (exploitation in 30 days)

5.9% · top 6.7% of all CVEs (7 Nov 2026)

CISA SSVC

Exploitation: none · Automatable: no · Technical impact: total

The list uses the assigner's score when there is one, then CISA's, then NVD's: Medium 6.4.

Weakness

• CWE-502 Deserialization of Untrusted Data
• CWE-502 Deserialization of Untrusted Data (opens in a new tab)All about CWE-502 and its CVEs

Affected products

• Spring · Spring Integration

  • affected 7.1.0
  • affected 7.0.0 – ≤ 7.0.5
  • affected 6.5.0 – ≤ 6.5.10
  • affected 6.4.0 – ≤ 6.4.12
  • affected ≤ 5.5.21

References (1)

• https://spring.io/security/cve-2026-47864 (opens in a new tab)

Sources

The same CVE in the primary databases and aggregators, to check against.

• CVE.org record (opens in a new tab)
• CVE List JSON (GitHub) (opens in a new tab)
• NVD (opens in a new tab)
• FIRST EPSS (opens in a new tab)
• OSV.dev (opens in a new tab)
• GitHub Advisories (opens in a new tab)
• CIRCL Vulnerability-Lookup (opens in a new tab)

Badge for a README or a ticket

[![CVE-2026-47864](https://trackcve.app/badge/CVE-2026-47864.svg)](https://trackcve.app/cve/CVE-2026-47864)

Record last updated 28 Aug 2026, 16:51 UTC.