Spring Security Advisories

CVE-2021-22095: Spring-AMQP Remote Denial of Service - Out of Memory Error with a Large Message Body

MEDIUM | NOVEMBER 29, 2021 | CVE-2021-22095


The Spring AMQP Message object, in its toString() method, will create a new String object from the message body, regardless of its size.

This can cause an OOM Error with a large message body.

Affected Spring Products and Versions

  • Spring AMQP
    • 2.2.0 - 2.2.19
    • 2.3.0 - 2.3.11


Users of affected versions should apply the following mitigation. 2.3.x users should upgrade to 2.3.12. 2.2.x users should upgrade to 2.2.20. No other steps are necessary. The toString() method now only converts the body if its length is 50 or fewer bytes. Releases that have fixed this issue include:

  • Spring AMQP
    • 2.4.0
    • 2.3.12
    • 2.2.20


This issue was identified and responsibly reported by Vasily Kochnev.


  • 2021-11-29: Initial vulnerability report published.

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